It should maintain itsself in terms of removing outdated entries. I will get into this what could be wrong.
You may ‘manually’ perform a TRUNCATE TABLE on this table. This will only possibly affect a few viewcounts by logged in users, or ‘forget’ searchroot or last search action of logged in user(s). No big issue.
Could not find why you have this issue, but I added the TRUNCATE TABLE in the code that is executed at plugin update, so – if you update regularly – you should not have to take any action. Btw: Running Table VIII-A1: Setup will do the same (as of version 6.6.26)
Thank you. Updating solved the problem.