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
ntpdate scb-other
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:
exit
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.