I had a similar problem today. I know I'm replying months later.
My problem was that I had an incorrect structure in the database.
Neither the database (postgres) nor kamailo complained about the
error. I upgraded from 5.6.1 to 5.7.2 and then the errors were obvious
from kamailio. I changed the structure of the database (I had
key_value as INTEGER instead of VARCHAR, etc) and then it worked
perfectly. It would have been easy for me to blame kamailio, but it
wasn't a kamailio bug.
Maybe instead I might have changed the debugging level to find the
cause; I skipped that because I had planned to upgrade kamailio to
5.7.2 anyway.

James

On Tue, 1 Aug 2023 at 07:27, Володимир Іванець <volodyaivanets@gmail.com> wrote:
>
> Hello!
>
> Kamailio 5.6 is not saving data to the DB on shutdown on CentOS 7 for me too.
>
> вт, 1 серп. 2023 р., 09:47 користувач <bkk@ednt.de> пише:
>>
>> Can someone confirm this?
>>
>> Or even better: is there a solution?
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