Getting warning about being close to max lists on board - can't find an actual documented max.

[Rep Licon]

When I log into my main Trello, I get a popup saying:

"You are approaching the limit on the number of lists you can have on a board. Please remove any lists which are unnecessary."

According to the documentation: https://trello.com/guide/trello-101

"There’s no limit to the number of lists you can add to a board, and they can be arranged and titled however you’d like."

So is it safe to assume the warning message is a bug, given that they explicitly document that there is no such limit? It'd really suck if it stopped working on me all of a sudden.

One note of interest: My board currently only has 17 active lists, but I do generate a todo list on a daily basis using the API, so I'm sure there are many hundreds of ARCHIVED lists on it.

I don't see an easy way to clean out my archived lists, aside from building a cleanup script that handles it through the API, so hopefully it's just a Trello bug that will go away on its own. My only other option would be to abandon ship and migrate to a new "main" board to work off of.

[David Bakkers · Accepted solution]

There are numerous limits in Trello, including how many Lists can exist on one Board.

If you search this forum for 'list limits', you will find this thread where the question is answered.

[Rep Licon]

Whelp, thanks! Since I don't see a way of cleaning up Archived lists, I'll have to just migrate active lists to a new board and abandon the old one. I guess I have something like 50-100 days to do it. :)

[Rep Licon]

Ah, looks like if I copy a board, it will bring everything along with it that is NOT archived, so that's perfect, I was able to do a pretty quick migration with it, and close the old board. Will probably delete old board in a week or two once I'm convinced results are good.

[Rasmus Wulff Jensen]

I don't know the specific max limit, but I have actually hit it in some automated API testing so it do exist despite the documentation... Imterestingly you can't actually delete a list (the API does not have such an option), so in your case the best approach if properly to moved some/all of the archived lists to an Archive board instead of starting from scratch