After migrating a VM from one vSphere cluster A to another vSphere cluster B the related "VM Overrides" rule in cluster A becomes invalid and cannot be deleted.
Task Error when trying to delete from UI:
"A specified parameter was not correct: spec.drsVmConfigSpec[0].key
No VM matches the provided key."
vCenter Server 8.0
The related VM does not anymore exist in cluster A
Take a fresh file-based backup and an offline snapshot of vCenter Server Appliance (VCSA) Snapshot Best practices for vCenter Server Virtual Machines
Upload Logs: Please collect and upload vCenter support bundle to your support case Collecting diagnostic information for VMware vCenter Server
Uploading files to cases on the Broadcom Support Portal
The resolution requires direct modification of the vCenter Server Database (VCDB), it is recommended to seek assistance from Broadcom Support to ensure database integrity.