🐛 fix(alembic): handle exception when altering column "user_id" in "flow" table to be nullable

🔥 chore(alembic): remove unnecessary code in downgrade function

src/backend/langflow/alembic/versions/f5ee9749d1a6_user_id_can_be_null_in_flow.py

@@ -34,9 +34,12 @@ def upgrade() -> None:
 
 def downgrade() -> None:
     # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table("flow", schema=None) as batch_op:
-        batch_op.alter_column(
-            "user_id", existing_type=sa.CHAR(length=32), nullable=False
-        )
+    try:
+        with op.batch_alter_table("flow", schema=None) as batch_op:
+            batch_op.alter_column(
+                "user_id", existing_type=sa.CHAR(length=32), nullable=False
+            )
+    except Exception:
+        pass
 
     # ### end Alembic commands ###