Hi, I am running Koha 17.05.05.000 on Ubuntu 14.04.1 with mysql Ver 14.14 Distrib 5.5.58. I regularly upgrade Koha via apt-get, and I've suddenly realized I cannot check-in items which had been checked-out (presumably before a certain upgrade). I can check-in items which have been checked-out with the presently installed release of Koha. Following the error message, I came across the wiki page: https://wiki.koha-community.org/wiki/DBMS_auto_increment_fix I followed the instructions given there, and added the additional init file as described there. No error reported by /var/log/mysql/error.log upon restarting or running the mysql service. However, I cannot yet check-in back items which were checked-out in the past. (I can still do that with new check-outs.) Since it seems that the problem is solved with new check-outs, would you recommend that I manually remove old check-outs from the database, and issue them again (with a new date - doesn't matter, as long as it works)? Many thanks and best regards, Giuseppe.