Hmm, deleting and recreating them is not an option for me unfortunately. Here is a more official report:
PRODUCT, VERSION, MICROUPDATE, OPERATING SYSTEM, ARCHITECTURE
Plesk Panel, 12.0.18, Update #29 (last updated at Dec 18, 2014 03:51 AM), CentOS 6.2 (Final), x86_64
PROBLEM DESCRIPTION...