Voicemail Admin not deleting greetings

I have looked for this and not found anything since 2.9

When I attempt to delete any greetings on an extension with the voicemail admin it says update complete, but the greeting is still there, it doesn’t actually delete it.

The log file (var/log/asterisk/freepbx_dbug) spits out

[WARNING]: array_merge() [function.array-merge]: Argument #1 is not an array

Any thoughts?