Please try to repeat this in a test environment. And, please try in a newer version. This, i have not seen myself, so if you can do a bugreport for now
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...
