Hi, Since updating from Upgraded from 5.0.23 (Fedora 26) to 6.0.1 last week. Since the update we are seeing the following error messages in the AdminLog: Mon Nov 27 13:40:09 2017 error OTRS-otrs.Daemon.pl - Daemon Kernel::System::Daemon::DaemonModules::SchedulerTaskWorker-10 Backend MasterSlave is invalid! Mon Nov 27 13:40:02 2017 error OTRS-CGI-10 Search not executed due to invalid value 'Master' on field 'MasterSlave'! MasterSlave was activated in an older version of OTRS, and seamlessly updated with the update from 5 to 6. Any idea how I can debug this problem? What extra information would I have to provide to find the cause of the problem. OTRS 6.0.1 Fedora 26 OTRSMasterSlave 6.0.1 Regards Rudolf Bargholz Online Travel Services AG Jenatschstrasse 1, 8002, Zürich, Switzerland Mail: bargholz@onlinetravel.ch Tel.: +41 (44) 2046006 Fax: +41 (44) 2046009