thank you for the answer
always same story ... why asking to check if there is nothing to check .... document are wrong ... we had teh same issues with windows 2, 3, 3.11 in the 90ies etc etc never stopped
well i've checked on another laptop and could use the recovery pass phrase to unlock .the USB .. i hope it will be reliable enough , but in case i will use another way to crypt the data on another USB , too much people complain they've lost access to their bitlocked drive ...
To verify that this is the correct recovery key, compare the start of the following identifier with the identifier value displayed on your PC.
If the above identifier matches the one displayed on your PC, use the following key to unlock the drive.
as usual with Microsoft that link https://go.microsoft.com/fwlink/?LinkID=260589 goes nowhere
and you're stuck ...
who can imagine you make software for more than 30 years and no even be able to maintain a permalink db !