Hi Almira,
You need to perform the below steps
1. Check the table CTS_IMP_Q_STATE , whether it is activated or not.
2. If it is activated , then try to upgrade the R3tarns and tp to latest level
3. If the second point does not work then , check the duplicate entries in the table CTS_IMP_Q_STATE.
Remove the entries and retry the steps.
You can also retry the steps after removing the entry CTS_IMP_Q_STATE from DDXTT table.
But i have no idea , about the table CTS_IMP_Q_STATE
With Regards
Ashutosh Chaturvedi