Artifact authorization problem

Hello, I have returned to SWTOR after some months of break, and wanted to continue playing the main class story of one of my characters, so I logged in to another character who had my endgame gear, and put all my gear that was previously authorized by subscription to the Legacy Bank. But when I logged back on my other character, it said "Requires artifact authorization", and I couldn't equip it on any of my level 80 characters. So basically all my gear that was previously authorized by subscription, got unauthorized. Correct me if I am wrong, but if I remember correctly once the subscription ends and a player goes Preferred, the Artifacts that the player has in his inventory gets labeled as "Previously Authorized by Subscription" meaning he can still equip them as a Preferred player, and can move them to other characters through Legacy Bank for them to use. But why is my gear getting locked?