Cannot remove VMWare policy from Networker as it doesn't exist on VBA

Hi everyone. Something strange has happened on removal of a VMware protection policy within the NMC. I deleted the policy without first removing the assignment to our VBA. Of course, it said 'Cannot delete the policy when there is a VBA assigned to it'. However, it did actually delete it from the VBA.

Now when I try to remove its assignment to the VBA, it fails with an error saying that it doesn't exist on the VBA - which is correct, it doesn't. However, that doesn't remove the flag saying that it's still assigned. So I cannot remove the policy from Networker, as it thinks it is assigned, but I cant remove the assignment, as the policy doesn't exist on the VBA!

It's complicated, and I'm going in circles! I've tried removing it from NSRAdmin but I get the same error. Is there any way to remove the policy from Networker at a file level or something?