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.