Error with Plugin Migration - Merge of two Matomo Installation

Hello,
when i start the command ./console migration:measurable --dry-run --source-idsite=1 --target-db-host=x.x.x.x --target-db-username=root --target-db-password=xxxxxx --target-db-name=stats-TEST

i get the error
Uncaught exception: /home/xxxxx/htdocs/stats/vendor/symfony/console/Symfony/Component/Console/Application.php(501): There are no commands defined in the “migration” namespace.
There are no commands defined in the “migration” namespace.

I use Matomo 3.13.3 on both sides.

Any ideas?