PDC and NTP - when you move the PDC move the NTP setup
If you move the FSMO role of PDC Emulator which is legacy then you need to ensure you update your domain time, failture to do so will result in massive skews in the domain time, which as a rule is not good.
On the PDC:
w32tm /config /manualpeerlist:"domaincontroller,0x1" /syncfromflags:MANUAL /reliable:yes
w32tm /config /update
w32tm /resync /rediscover
On all other Domain Controllers:
w32tm /config /syncfromflags:DOMHIER /update
net stop w32time & net start w32time
w32tm /resync /force
w32tm /query /source
Check the "skew" which is in bold, if you are correcting time issues this will start high and slowly skew to low as you can see here (in bold below) its 0.47 seconds off the source, which is good, this started at best 5.87 seconds and worst 36.9 seconds
w32tm /stripchart /computer:<domaincontroller> /samples:2 /dataonly
Tracking domaincontroller [x.x.x.x:123].
Collecting 2 samples.
The current time is 03/05/2021 15:16:51.