After you restart please try and create the ring group. After it fails go to your 3cx management console and go to General/Support and generate support info.
Please send me this info at my email and I will look at it.
Hello sir, I think the issue was with the old database of version 1928. Please try and backup the existing configuration you have on version 2295, and restore it again on the same 2295 version. This should clear up the database and hopefully fix any problems.