but even when it is set to true, this does only work in a standard installation and not inside a docker container installation with PostgreSQL database:
root@abc:/var/xyz/mattermost# docker-compose exec app sh
~ $ mmctl user delete u78yrxgftpg89bwijmy6ez98we --confirm --local
Unable to delete user ‘username’ error: : Konnte die zu löschenden Nachrichten für den Benutzer nicht auswählen.,
(Could not select the messages for the user to delete)