Error - BaseItemGet

Hi
We have a problem with one user (me) on our ASG RD 2015 8.9.5034.1
This installetion is running for more then a year and is ussed by more then 20 useres. Until yesterday i had no problem to use id.
When i start ASG RD i get following error message:
An error occured on executing an sql statment
BaseLineGet

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What can i do to resolve this?

Regards
Daniel