The way you described it, it sounds like you might have some corrupted data in your register. I would suggest you to do perform export/import and see if problem persists.
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...
