Having tried to log in on the wife's Client, but my PSN account on day one on Phase 4.
The code identifies the owner of that specific client, and was locking me out of using it on my account.
Even had her square ID greyed out and unchangable in the sign-in box.
Synapsis Ataxia 50 WHM~ Ultros
XI From Beta to Sea, Retired. 75 WHM/THF+few other ones I liked playing less...