I have tried the Bugfix #17 but it would fix my problem.
I like to upgrade to lastes version cause I need to transfer the data to a new Server. Would it be possible to install v2015 on the new Server and take my DB from the old with v2011?
You can dump the old database with mysqldump, import it on the new machine and apply scripts update_openemm-2011-2013.sql and update_openemm-2013_R2-2015.sql to upodate the old database to the 2015 level.