If the other device is not listed with a bitlocker key, it is possible that bitlocker is not enabled on that device?
Do you currently have access to that device?
If so, You can type cmd in the search on the taskbar, make sure you use "run as administrator" to launch Command Prompt, then run this command:
manage-bde -status
Does it show that bitlocker is enabled? If it is, disable it with this command, make sure you let it run through.
manage-bde -off C: