How to connect User's account to previous data volume, prior to incident

Mac OS 12.2 on M1 Mac Mini

User 'Graeme' has his data volume on an external SSD set to '/Volumes/2TBHD/MovedUsers/Graeme'

SSD got disconnected from the machine. Machine was rebooted, user 'Graeme' tried to log in but was presented with 'You are unable to login to the user account 'Graeme' at this time' popup.

Reconnected the SSD. Restarted machine. User Graeme was able to log in, but the user profile was 'refreshed' from scratch - i.e. on login Mac OS asked me to log in with Apple ID, set Accessibility preferences etc. Starting any installed applications (which I would have previously installed 'for all users') they run like it is the first time they have been opened.

On the /Volumes I see that user 'Graeme' has data volume as '/Volumes/2TBHD/MovedUsers/graeme' BUT all the 'old' user Graeme's files etc are now showing as in '/Volumes/2TBHD 1/MovedUsers/graeme'

How can I change the mount point(?) of the data location for the user Graeme, so machine will start up user with the correct Library/Applications/Preferences etc.?

Can I remove/rename '2TBHD', and rename '2TBHD 1' back to '2TBHD' with much confidence, chance of success?

I have an Administrator user available. I have already run Disk Utility First Aid on the SSD, which did some repairs, but still user 'Graeme' is connected to wrong mount point.

Thanks