fix record of study creation, fixes #3480

git-svn-id: svn://develop.studip.de/studip/trunk@27593 c5b85792-5220-0410-ad23-ed5b6b8ad999
remove debug code, refines [27593], re #3480

git-svn-id: svn://develop.studip.de/studip/trunk@27594 c5b85792-5220-0410-ad23-ed5b6b8ad999