[SOLVED] How can I delete teams?

Tried that, no luck:

root@254daecba851:/mattermost/bin# ./platform team delete "AMS" -c /mattermost/config/config.json
Have you performed a database backup? (YES/NO):
YES
Are you sure you want to delete the teams specified?  All data will be permanently deleted? (YES/NO):
YES
Unable to find team 'AMS'
root@254daecba851:/mattermost/bin#

Also tried "AMS" but got the same result.