This is caused by stale database entries in the network_backing table of the vCloud Director database.
0. Take a backup of the vCloud Director database
1. Check the Network Pool assigned to this OvDC from the vCD Provider UI.
2. Query network_pool to grab the id for this network pool.# select * from network_pool where name='network_pool_name';
3. Query real_network_backing with the network_pool id.
# select * from real_network_backing where where rnet_id in (select id from real_network where pool_id='network_pool id');
4. Query the network_backing with the network_pool id.
# select * from network_backing where pool_id='network_pool id';
5. Update the network_backing to set the rnet_id to null. This will release the pool consumption to 0 to allow us to deploy networks for this vapp.
# UPDATE network_backing set rnet_id=NULL where pool_id='network_pool id';
6. Re-attempt VM power On.