Rack Controler's time isn't correct

Hello guys,
my rack controller has my NTP servers (checked the Use external NTP servers only too) set correctly, but still it has not the right time and it is hours slower than my region’s time.
May i kindly ask you guys, if you have a tipp for me?
Thanks a lot.
Best regards.

what if you configure the host of the region to use the same ntp servers?

The direct approach is to check your /etc/ntp.conf and dmesg to see what happened there.
Normally even if the time is not synced with NTP server, the time diff should not be several hours when the machine is down and the BIOS battery is still alive.