Fix NameError

✅ Solution

This NameError in Alembic usually arises when a required class or function, such as `FetchedValue`, is used without being properly imported from the SQLAlchemy or Alembic libraries. To resolve this, add an explicit import statement at the top of your migration script, such as `from sqlalchemy.orm import FetchedValue` or `from sqlalchemy import FetchedValue`, depending on the specific location of the missing class in the SQLAlchemy/Alembic library. Ensure the import statement aligns with the documentation for the Alembic/SQLAlchemy version being used.