i do not know how an asset loaded when missing.
The asset is <kuid:-2:493265801> and an extended data base exercise did not fix it.
Please advise how to fix it.
Most of the time when I see this happen it is due to another asset obsoleting the built-in asset. But I normally see that happening in TS12. Can you see the asset in content manager?
Solved the problem with the missing asset. Only some of my sessions were affected.
I opened the faulty sessions and moved a consist then saved the session thus clearing the faulty session.