Log server problem

I have the following problem, please help me
The system log shows that the server starts up periodically every day as shown in the attached image, but the virtual servers for VPN user groups still operate for many days. Checking the time on Centos, the uptime is 222 days.

Check the uptime of sudo systemctl status pritunl and sudo journalctl -u pritunl -n 1000 for errors.

Loaded: loaded (/etc/systemd/system/pritunl.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2023-09-25 01:41:40 +07; 7 months 18 days ago
->Time since server reboot, September 25, 2023. When cat pritunl.log, the log is now saved from September 5, 2023, and there is a daily startup log from there.
[restless-skies-7627][2023-09-05 14:45:00,271][INFO] Server restarting…
[restless-skies-7627][2023-09-05 14:45:00,306][INFO] Starting server

I want to find where to configure the daily reboot time to adjust or delete it