Symptom
1. Create VLAN pool based network using vCD (eg., vApp Nw)
2. do a copy running-config startup-config
3. Power Off the vApp.
4. Reload VSM without copy running-config startup-config
5. Power On that vApp to create VLAN pool based network you will hit this issue (unable to create new VLAN based network)
Workaround
Delete the stale port-profile manually and try to create a network. Going forward do a periodic copy running-config startup-config. Especially before VSM reload