Failed to create external network as port group dvportgroup-xxxx or its VLAN ID xxxx is in use

I am busy scripting the creation of the DVS prot groups and external networks and organization networks in vCloud  5.5.4.

I have run the script a few times, but after the last cleanup I did through the UI I have been unable to create the external networks again.

I keep getting the error:

Failed to create external network as port group dvportgroup-xxxx or its VLAN ID xxxx is in use.

I have found the older KB articles for the DB tables to clean (KB2042474) but the table structure has obviously changed beteen versions.

I am hoping someone could point me in the direction of what I can run to clean up the new DB so that I can create these external networks again?