I do remember an issue with RCC on 3.7 dealing with XML errors that should not have been seen.
Of course, a patch corrected this problem.
If you're getting invalid XML, you can skip it and move on.
If you're getting incompatible XML, you got bigger problem.
Its doubtful that the problem is with the Database because the XML stream is between the BCM and the RCC Server.
You might want to upgrade to the latest Core, VM, and RCC.
There is a new benefit in the latest RCC for the end user.
You now have the ability to purge old Database records.
This is a great addition, as you can control the size of the CCRDB and avoid DB corruption.
-SD-