After upgrade from server 2012 DC to server 2019 DC

I'm facing the "Applying Replica Changes" issue on my Replicated VMS. This issue occurs after upgrading both the primary and replica servers from the 2012 R2 Datacenter to the 2019 Datacenter.
A quick reboot makes the issue temporarily resolved but it occurs after a few hours. Also, I tried to cancel "Applying Replica Changes" but it's still showing the error and Events logs giving me this error
"Hyper-V failed to delete checkpoint '7A2CE142-0647-49EF-88B4-A06B1414663B' for virtual machine 'machine name'. (Virtual machine ID xxxxxx-xx-xxxx-xxxx-xxxxxxxxxx). Checkpoint deletion will be retried later.
Also unable to delete the checkpoint of replica VM.