According to a description of #17299 and symfony/symfony#37626 (comment) information about manual filtering of the Doctrine migrations table was restored in documentation because it was unclear why it was removed previously.

It was removed because of the implementation of automatic registration of Messenger's table schema in Doctrine schema in symfony/symfony#36655 which is landed in Symfony 5.1.

Because of this, having this tip in the Symfony documentation is not actual and misleading. I would like to propose to revert #17299 to remove it again.