How do you solve "approaching the limit on the number of lists you can have"?

[Matt Parker]

I've just gotten the warning "You are approaching the limit on the number of lists you can have on a board. Please remove any lists which are unnecessary."  This is on a board where I have ballpark 1,000 archived lists and 5 unarchived lists.  I've deleted all archived cards, but the lists the cards were on remain in the archive.  From what I can tell, there is no way to delete them.  So when the warning says to "remove" them, what does it expect me to do?  It's obviously not going to be a scalable solution for me to unarchive 1,000 lists and move them to some kind of Archived Lists board, and my preference is not to have to abandon this board and create a new one.

[Augusto Lisboa]

Hi Matt!

In this situation, our best option is to transfer the unarchived lists to a new board or create a duplicate of the existing board.

Options include:

• Moving Cards or Lists
• Copying cards, lists, or boards.

Unfortunately, there is currently no method for bulk management of these lists.

To prevent this issue in the future, we recommend checking out a community discussion on implementing automation: https://community.atlassian.com/t5/Trello-questions/Looking-for-simple-Deleting-Lists-workaround/qaq-p/2361227