Please log in to the boot shell of the master node and execute the following:
ssh scb-other # this will drop you to the slave node's boot shell. If you get prompted with host key verification please type yes
systemctl stop ntp
systemctl start ntp
The only output should come from the ntpdate command saying that it stepped the time by some amount.
Go back to master node with:
and here execute:
systemctl restart ntp
After this the master-slave sync should start immediately, master will sync to configured NTP in a couple of minutes.
Please double-check Date & Time about 20 minutes later.