Auto increment uses the system id you specify in your sysconfig and then an auto increment in a file called TicketCounter.log, when you migrate over just change the number in this file to the last ticket # you used. Just go into this file /opt/otrs/var/log/TicketCounter.log (default location) and change the number when you migrate. Rob From: otrs-bounces@otrs.org [mailto:otrs-bounces@otrs.org] On Behalf Of johnbarratt@mail.com Sent: Friday, November 13, 2009 9:40 AM To: otrs@otrs.org Subject: [otrs] Ticket Numbering We are in the process of migrating our production OTRS system to version 2.4.5 (from 2.3.4). We use AutoIncrement ticket numbering: testing the new version with a migrated copy of our 2.3.4 system's database, tickets appear to be getting assigned ticket numbers that had previously been used, but had been deleted from the original system in the run up to taking it live. Is the re-use of previously used but deleted ticket numbers a behaviour that we would expect to see when upgrading the system? Thanks, John Barratt