Move switch port to another VDOM

I am trying to migrate a switch port from root vdom to inside. When I do that the port it does not appear in the inside VDOM and it does not accept any commands in root vdom and it gives the error:

“Invalid switch port
object set operator error, -651 discard the setting
Command fail. Return code -651”

I managed to bring the port back if I make the change in the config file and then upload the file to the fortigate. However, when I try to move the port again to inside I have the same issue.

Also made the corrections mentione in: 

Fortigate 400E version 7.4.11 build2878

FortiSwitch: S224DF-v7.4.6-build895,250129 (GA)