Target database is not up to date

After creating a migration, either manually or as --autogenerate, you must apply it with alembic upgrade head. If you used db.create_all() from a shell, you can use alembic stamp head to indicate that the current state of the database represents the application of all migrations.

This Worked For me

$ flask db stamp head$ flask db migrate$ flask db upgrade

My stuation is like this question, When I execute "./manage.py db migrate -m 'Add relationship'", the error occused like this "alembic.util.exc.CommandError: Target database is not up to date."

So I checked the status of my migrate:

(venv) ]#./manage.py db headsd996b44eca57 (head)(venv) ]#./manage.py db currentINFO  [alembic.runtime.migration] Context impl SQLiteImpl.INFO  [alembic.runtime.migration] Will assume non-transactional DDL.715f79abbd75

and found that the heads and the current are different!

I fixed it by doing this steps:

(venv)]#./manage.py db stamp headsINFO  [alembic.runtime.migration] Context impl SQLiteImpl.INFO  [alembic.runtime.migration] Will assume non-transactional DDL.INFO  [alembic.runtime.migration] Running stamp_revision 715f79abbd75 -> d996b44eca57

And now the current is same to the head

(venv) ]#./manage.py db currentINFO  [alembic.runtime.migration] Context impl SQLiteImpl.INFO  [alembic.runtime.migration] Will assume non-transactional DDL.d996b44eca57 (head)

And now I can do the migrate again.