Bicep CLI version 0.28.1

Describe the bug
When redeploying a Recovery Services Vault with Private Endpoint, This already exists with VM's using the Backup feature.
I am getting the error:

[{"code":"NameOfExistingPrivateEndpointNicCannotBeChanged","message":"Private Endpoint /subscriptions/xxxxx/resourceGroups/xxxx/providers/Microsoft.Network/privateEndpoints/xxxx-backup-rsv-pep contains existing NIC name xxx-backup-rsv-pep-nic which does not match request's custom network interface name . Updating the name of existing nic not allowed.","details":

however from other environments using the exact same code the NIC has a GUI at the end of the naming convention:

xxxy-backup-rsv-pep.nic.467cef69-ed43-4cbc-9d79-981a3984d293
this i can see is the only issue that i can see as the specific NIC is: [xxxx-backup-rsv-pep-nic]

To Reproduce
Running Pipeline and this still has the same problem.

Additional context
Add any other context about the problem here.

the Original RSV was deployed using the same Pipeline. Please can someone help me?