Hi Sai,
It looks like MAXLOCKS values has reached and system returns a collision message.
You may analyse the lock situation using the path below
In transaction DB50, choose "Problem analysis -> SQL-Locks -> Overview
More informaiton on lock situaton is explained in below SAP note.
1243937 - FAQ: SAP MaxDB/liveCache SQL and object locks
You may need to increase the value of MAXLOCKS and then check the results.
Hope this helps.
Regards,
Deepak Kori