Yes I know the limit is 10 but when trying to add 1 more (I deleted several old ones) it is not possible.  And I have had long time Trello account..

• Trello
• cloud
• limits
• trello
• trello-cloud

In the Trello documentation, it is mentioned that lists and cards cannot be deleted: Deletion is permanent in Trello and in an effort to prevent accidental deletions we do not have an option to dele...

• Trello
• limits
• list
• trello