diff --git a/src/backend/langflow/interface/types.py b/src/backend/langflow/interface/types.py
index 5c6fec674..59bd81555 100644
--- a/src/backend/langflow/interface/types.py
+++ b/src/backend/langflow/interface/types.py
@@ -129,7 +129,8 @@ def add_new_custom_field(
         **sanitize_field_config(field_config),
     )
     frontend_node.template.upsert_field(field_name, new_field)
-    frontend_node.custom_fields[field_name] = None
+    if isinstance(frontend_node.custom_fields, dict):
+        frontend_node.custom_fields[field_name] = None
 
     return frontend_node
 
diff --git a/src/backend/langflow/template/field/base.py b/src/backend/langflow/template/field/base.py
index 9d6c9a0e6..d59aaa68f 100644
--- a/src/backend/langflow/template/field/base.py
+++ b/src/backend/langflow/template/field/base.py
@@ -37,10 +37,10 @@ class TemplateField(BaseModel):
     password: bool = False
     """Specifies if the field is a password. Defaults to False."""
 
-    options: Union[list[str], Callable] = None
+    options: Optional[Union[list[str], Callable]] = None
     """List of options for the field. Only used when is_list=True. Default is an empty list."""
 
-    name: str = None
+    name: Optional[str] = None
     """Name of the field. Default is an empty string."""
 
     display_name: Optional[str] = None
@@ -61,7 +61,7 @@ class TemplateField(BaseModel):
     refresh: Optional[bool] = None
     """Specifies if the field should be refreshed. Defaults to False."""
 
-    range_spec: Optional[RangeSpec] = Field(None, serialization_alias="rangeSpec")
+    range_spec: Optional[RangeSpec] = Field(default=None, serialization_alias="rangeSpec")
     """Range specification for the field. Defaults to None."""
 
     def to_dict(self):
diff --git a/src/backend/langflow/template/frontend_node/base.py b/src/backend/langflow/template/frontend_node/base.py
index ac001047c..92c748dca 100644
--- a/src/backend/langflow/template/frontend_node/base.py
+++ b/src/backend/langflow/template/frontend_node/base.py
@@ -44,7 +44,7 @@ class FrontendNode(BaseModel):
     description: Optional[str] = None
     base_classes: List[str]
     name: str = ""
-    display_name: str = ""
+    display_name: Optional[str] = ""
     documentation: str = ""
     custom_fields: Optional[Dict] = defaultdict(list)
     output_types: List[str] = []
@@ -201,7 +201,8 @@ class FrontendNode(BaseModel):
     @staticmethod
     def handle_kwargs_field(field: TemplateField) -> None:
         """Handles kwargs field by setting certain attributes."""
-        if "kwargs" in field.name.lower():
+
+        if "kwargs" in (field.name or "").lower():
             field.advanced = True
             field.required = False
             field.show = False
diff --git a/src/backend/langflow/template/frontend_node/chains.py b/src/backend/langflow/template/frontend_node/chains.py
index 4168bd9e1..5ff211f68 100644
--- a/src/backend/langflow/template/frontend_node/chains.py
+++ b/src/backend/langflow/template/frontend_node/chains.py
@@ -48,16 +48,16 @@ class ChainFrontendNode(FrontendNode):
     @staticmethod
     def format_field(field: TemplateField, name: Optional[str] = None) -> None:
         FrontendNode.format_field(field, name)
-
-        if "name" == "RetrievalQA" and field.name == "memory":
+        key = field.name or ""
+        if "name" == "RetrievalQA" and key == "memory":
             field.show = False
             field.required = False
 
         field.advanced = False
-        if "key" in field.name:
+        if "key" in key:
             field.password = False
             field.show = False
-        if field.name in ["input_key", "output_key"]:
+        if key in ["input_key", "output_key"]:
             field.required = True
             field.show = True
             field.advanced = True
@@ -71,26 +71,26 @@ class ChainFrontendNode(FrontendNode):
         #     field.value = field.value.template
 
         # Separated for possible future changes
-        if field.name == "prompt" and field.value is None:
+        if key == "prompt" and field.value is None:
             field.required = True
             field.show = True
             field.advanced = False
-        if field.name == "memory":
+        if key == "memory":
             # field.required = False
             field.show = True
             field.advanced = False
-        if field.name == "verbose":
+        if key == "verbose":
             field.required = False
             field.show = False
             field.advanced = True
-        if field.name == "llm":
+        if key == "llm":
             field.required = True
             field.show = True
             field.advanced = False
             field.field_type = "BaseLanguageModel"  # temporary fix
             field.is_list = False
 
-        if field.name == "return_source_documents":
+        if key == "return_source_documents":
             field.required = False
             field.show = True
             field.advanced = True
diff --git a/src/backend/langflow/template/frontend_node/embeddings.py b/src/backend/langflow/template/frontend_node/embeddings.py
index 6d3f43d64..a2974487e 100644
--- a/src/backend/langflow/template/frontend_node/embeddings.py
+++ b/src/backend/langflow/template/frontend_node/embeddings.py
@@ -22,13 +22,14 @@ class EmbeddingFrontendNode(FrontendNode):
     @staticmethod
     def format_vertex_field(field: TemplateField, name: str):
         if "VertexAI" in name:
+            key = field.name or ""
             advanced_fields = [
                 "verbose",
                 "top_p",
                 "top_k",
                 "max_output_tokens",
             ]
-            if field.name in advanced_fields:
+            if key in advanced_fields:
                 field.advanced = True
             show_fields = [
                 "verbose",
@@ -42,21 +43,22 @@ class EmbeddingFrontendNode(FrontendNode):
                 "top_k",
             ]
 
-            if field.name in show_fields:
+            if key in show_fields:
                 field.show = True
 
     @staticmethod
     def format_jina_fields(field: TemplateField):
-        if "jina" in field.name:
+        name = field.name or ""
+        if "jina" in name:
             field.show = True
             field.advanced = False
 
-        if "auth" in field.name or "token" in field.name:
+        if "auth" in name or "token" in name:
             field.password = True
             field.show = True
             field.advanced = False
 
-        if field.name == "jina_api_url":
+        if name == "jina_api_url":
             field.show = True
             field.advanced = True
             field.display_name = "Jina API URL"
@@ -64,14 +66,15 @@ class EmbeddingFrontendNode(FrontendNode):
 
     @staticmethod
     def format_openai_fields(field: TemplateField):
-        if "openai" in field.name:
+        name = field.name or ""
+        if "openai" in name:
             field.show = True
             field.advanced = True
-            split_name = field.name.split("_")
+            split_name = name.split("_")
             title_name = " ".join([s.capitalize() for s in split_name])
             field.display_name = title_name.replace("Openai", "OpenAI").replace("Api", "API")
 
-        if "api_key" in field.name:
+        if "api_key" in name:
             field.password = True
             field.show = True
             field.advanced = False
@@ -83,13 +86,14 @@ class EmbeddingFrontendNode(FrontendNode):
             EmbeddingFrontendNode.format_vertex_field(field, name)
         field.advanced = not field.required
         field.show = True
-        if field.name == "headers":
+        key = field.name or ""
+        if key == "headers":
             field.show = False
-        if field.name == "model_kwargs":
+        if key == "model_kwargs":
             field.field_type = "dict"
             field.advanced = True
             field.show = True
-        elif field.name in [
+        elif key in [
             "model_name",
             "temperature",
             "model_file",
@@ -99,9 +103,9 @@ class EmbeddingFrontendNode(FrontendNode):
         ]:
             field.advanced = False
             field.show = True
-        if field.name == "credentials":
+        if key == "credentials":
             field.field_type = "file"
-        if name == "VertexAI" and field.name not in [
+        if name == "VertexAI" and key not in [
             "callbacks",
             "client",
             "stop",
diff --git a/src/backend/langflow/template/frontend_node/formatter/field_formatters.py b/src/backend/langflow/template/frontend_node/formatter/field_formatters.py
index 40f2b780c..42d3321ff 100644
--- a/src/backend/langflow/template/frontend_node/formatter/field_formatters.py
+++ b/src/backend/langflow/template/frontend_node/formatter/field_formatters.py
@@ -9,7 +9,7 @@ from langflow.utils.constants import ANTHROPIC_MODELS, CHAT_OPENAI_MODELS, OPENA
 
 class OpenAIAPIKeyFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        if "api_key" in field.name and "OpenAI" in str(name):
+        if field.name and "api_key" in field.name and "OpenAI" in str(name):
             field.display_name = "OpenAI API Key"
             field.required = False
             if field.value is None:
@@ -25,14 +25,14 @@ class ModelSpecificFieldFormatter(FieldFormatter):
     }
 
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        if name in self.MODEL_DICT and field.name == "model_name":
+        if field.name and name in self.MODEL_DICT and field.name == "model_name":
             field.options = self.MODEL_DICT[name]
             field.is_list = True
 
 
 class KwargsFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        if "kwargs" in field.name.lower():
+        if field.name and "kwargs" in field.name.lower():
             field.advanced = True
             field.required = False
             field.show = False
@@ -40,11 +40,11 @@ class KwargsFormatter(FieldFormatter):
 
 class APIKeyFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        if "api" in field.name.lower() and "key" in field.name.lower():
+        if field.name and "api" in field.name.lower() and "key" in field.name.lower():
             field.required = False
             field.advanced = False
 
-            field.display_name = field.name.replace("_", " ").title()
+            field.display_name = (field.name or "").replace("_", " ").title()
             field.display_name = field.display_name.replace("Api", "API")
 
 
@@ -94,7 +94,7 @@ class SpecialFieldFormatter(FieldFormatter):
 
 class ShowFieldFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        key = field.name
+        key = field.name or ""
         required = field.required
         field.show = (
             (required and key not in ["input_variables"])
@@ -106,7 +106,7 @@ class ShowFieldFormatter(FieldFormatter):
 
 class PasswordFieldFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        key = field.name
+        key = field.name or ""
         show = field.show
         if any(text in key.lower() for text in {"password", "token", "api", "key"}) and show:
             field.password = True
@@ -114,7 +114,7 @@ class PasswordFieldFormatter(FieldFormatter):
 
 class MultilineFieldFormatter(FieldFormatter):
     def format(self, field: TemplateField, name: Optional[str] = None) -> None:
-        key = field.name
+        key = field.name or ""
         if key in {
             "suffix",
             "prefix",
diff --git a/src/backend/langflow/template/frontend_node/llms.py b/src/backend/langflow/template/frontend_node/llms.py
index 748617e16..e33c4a60a 100644
--- a/src/backend/langflow/template/frontend_node/llms.py
+++ b/src/backend/langflow/template/frontend_node/llms.py
@@ -1,10 +1,9 @@
 from typing import Optional
-from langflow.services.database.models.base import orjson_dumps
 
+from langflow.services.database.models.base import orjson_dumps
 from langflow.template.field.base import TemplateField
 from langflow.template.frontend_node.base import FrontendNode
-from langflow.template.frontend_node.constants import CTRANSFORMERS_DEFAULT_CONFIG
-from langflow.template.frontend_node.constants import OPENAI_API_BASE_INFO
+from langflow.template.frontend_node.constants import CTRANSFORMERS_DEFAULT_CONFIG, OPENAI_API_BASE_INFO
 
 
 class LLMFrontendNode(FrontendNode):
@@ -24,6 +23,7 @@ class LLMFrontendNode(FrontendNode):
 
     @staticmethod
     def format_vertex_field(field: TemplateField, name: str):
+        key = field.name or ""
         if "VertexAI" in name:
             advanced_fields = [
                 "tuned_model_name",
@@ -32,7 +32,7 @@ class LLMFrontendNode(FrontendNode):
                 "top_k",
                 "max_output_tokens",
             ]
-            if field.name in advanced_fields:
+            if key in advanced_fields:
                 field.advanced = True
             show_fields = [
                 "tuned_model_name",
@@ -47,20 +47,19 @@ class LLMFrontendNode(FrontendNode):
                 "top_k",
             ]
 
-            if field.name in show_fields:
+            if key in show_fields:
                 field.show = True
 
     @staticmethod
     def format_openai_field(field: TemplateField):
-        if "openai" in field.name.lower():
-            field.display_name = (field.name.title().replace("Openai", "OpenAI").replace("_", " ")).replace(
-                "Api", "API"
-            )
+        key = field.name or ""
+        if "openai" in key.lower():
+            field.display_name = (key.title().replace("Openai", "OpenAI").replace("_", " ")).replace("Api", "API")
 
-        if "key" not in field.name.lower() and "token" not in field.name.lower():
+        if "key" not in key.lower() and "token" not in key.lower():
             field.password = False
 
-        if field.name == "openai_api_base":
+        if key == "openai_api_base":
             field.info = OPENAI_API_BASE_INFO
 
     def add_extra_base_classes(self) -> None:
@@ -69,13 +68,14 @@ class LLMFrontendNode(FrontendNode):
 
     @staticmethod
     def format_azure_field(field: TemplateField):
-        if field.name == "model_name":
+        key = field.name or ""
+        if key == "model_name":
             field.show = False  # Azure uses deployment_name instead of model_name.
-        elif field.name == "openai_api_type":
+        elif key == "openai_api_type":
             field.show = False
             field.password = False
             field.value = "azure"
-        elif field.name == "openai_api_version":
+        elif key == "openai_api_version":
             field.password = False
 
     @staticmethod
@@ -85,7 +85,8 @@ class LLMFrontendNode(FrontendNode):
 
     @staticmethod
     def format_ctransformers_field(field: TemplateField):
-        if field.name == "config":
+        key = field.name or ""
+        if key == "config":
             field.show = True
             field.advanced = True
             field.value = orjson_dumps(CTRANSFORMERS_DEFAULT_CONFIG, indent_2=True)
@@ -105,10 +106,11 @@ class LLMFrontendNode(FrontendNode):
         if name and "vertex" in name.lower():
             LLMFrontendNode.format_vertex_field(field, name)
         SHOW_FIELDS = ["repo_id"]
-        if field.name in SHOW_FIELDS:
+        key = field.name or ""
+        if key in SHOW_FIELDS:
             field.show = True
 
-        if "api" in field.name and ("key" in field.name or ("token" in field.name and "tokens" not in field.name)):
+        if "api" in key and ("key" in key or ("token" in key and "tokens" not in key)):
             field.password = True
             field.show = True
             # Required should be False to support
@@ -116,7 +118,7 @@ class LLMFrontendNode(FrontendNode):
             field.required = False
             field.advanced = False
 
-        if field.name == "task":
+        if key == "task":
             field.required = True
             field.show = True
             field.is_list = True
@@ -124,13 +126,13 @@ class LLMFrontendNode(FrontendNode):
             field.value = field.options[0]
             field.advanced = True
 
-        if display_name := display_names_dict.get(field.name):
+        if display_name := display_names_dict.get(key):
             field.display_name = display_name
-        if field.name == "model_kwargs":
+        if key == "model_kwargs":
             field.field_type = "dict"
             field.advanced = True
             field.show = True
-        elif field.name in [
+        elif key in [
             "model_name",
             "temperature",
             "model_file",
@@ -140,9 +142,9 @@ class LLMFrontendNode(FrontendNode):
         ]:
             field.advanced = False
             field.show = True
-        if field.name == "credentials":
+        if key == "credentials":
             field.field_type = "file"
-        if name == "VertexAI" and field.name not in [
+        if name == "VertexAI" and key not in [
             "callbacks",
             "client",
             "stop",
diff --git a/src/backend/langflow/template/frontend_node/prompts.py b/src/backend/langflow/template/frontend_node/prompts.py
index ffeef921c..03445f753 100644
--- a/src/backend/langflow/template/frontend_node/prompts.py
+++ b/src/backend/langflow/template/frontend_node/prompts.py
@@ -1,6 +1,7 @@
 from typing import Optional
 
 from langchain.agents.mrkl import prompt
+
 from langflow.template.field.base import TemplateField
 from langflow.template.frontend_node.base import FrontendNode
 from langflow.template.frontend_node.constants import DEFAULT_PROMPT, HUMAN_PROMPT, SYSTEM_PROMPT
@@ -20,14 +21,15 @@ class PromptFrontendNode(FrontendNode):
             "examples",
             "format_instructions",
         ]
+        key = field.name or ""
         if field.field_type == "StringPromptTemplate" and "Message" in str(name):
             field.field_type = "prompt"
             field.multiline = True
-            field.value = HUMAN_PROMPT if "Human" in field.name else SYSTEM_PROMPT
-        if field.name == "template" and field.value == "":
+            field.value = HUMAN_PROMPT if "Human" in key else SYSTEM_PROMPT
+        if key == "template" and field.value == "":
             field.value = DEFAULT_PROMPT
 
-        if field.name in PROMPT_FIELDS:
+        if key and key in PROMPT_FIELDS:
             field.field_type = "prompt"
             field.advanced = False
 
@@ -48,7 +50,8 @@ class PromptTemplateNode(FrontendNode):
     @staticmethod
     def format_field(field: TemplateField, name: Optional[str] = None) -> None:
         FrontendNode.format_field(field, name)
-        if field.name == "examples":
+
+        if (field.name or "") == "examples":
             field.advanced = False
 
 
diff --git a/src/backend/langflow/template/frontend_node/vectorstores.py b/src/backend/langflow/template/frontend_node/vectorstores.py
index 73e9aaaca..170c3c766 100644
--- a/src/backend/langflow/template/frontend_node/vectorstores.py
+++ b/src/backend/langflow/template/frontend_node/vectorstores.py
@@ -3,7 +3,6 @@ from typing import List, Optional
 from langflow.template.field.base import TemplateField
 from langflow.template.frontend_node.base import FrontendNode
 
-
 BASIC_FIELDS = [
     "work_dir",
     "collection_name",
@@ -313,7 +312,7 @@ class VectorStoreFrontendNode(FrontendNode):
             field.show = True
             field.advanced = False
             field.is_list = True
-        elif "embedding" in field.name:
+        elif field.name and "embedding" in field.name:
             # for backwards compatibility
             field.name = "embedding"
             field.required = True