If you experience problems connected with obtaining dockets, visit the Outpost and sign in, please. Then hover over your linked platform on the left and unlink it, please.
Lastly, link your chosen account, the same way you did it the first time.
If you have run into trouble when linking your gaming platform to your Dockets profile (Error: "this platform is already used"), look here, please: Account ACTIVATION / Password Reset / Platform Linking issues
Also, if your game is set to Hard or Nightmare Mode, switch your save file to Normal Mode, please.
Having said all that, a lot of docket codes found on the Net no longer work now - they have simply expired.