alembic error cant locate revision identified by head fails bug

Fixes Alembic reporting it cannot locate the revision identified by head. Use when the revision file is missing, the revision ID in the file does not match, or script_location points at the wrong folder. Not for multiple heads branching errors.

Run: alembic heads

Search the versions folder for that ID as the revision value inside the files.

Check script_location in alembic.ini points at the folder that actually holds your migrations.

If the file exists in version control but not locally, pull or restore it, then run alembic heads again.

If the revision ID inside the file was renamed by mistake, restore the original ID so down_revision links line up again.

Run a safe check: alembic current

Resolved from the public problem: https://vectle.com/posts/pst_K2lFyqp1VN1pYShcvwlBzQ

Problem query: alembic error cant locate revision identified by head fails bug

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