Keep History : Seafile Pro

I just noticed a weird thing on our seafile.
I thought the max file history was 30 days via
But when my users go to the :History Setting of the library, they select :Keep full history and have access to the full history.

In addition I also notice that the Delete section contains files older than 30 days…

I missed a setting to keep nothing more than 30 days maximum?

Thank you