Locking the Training Logbook to editing which links to the Training Matrix

Make the Training Logbook which is associated with the Training Matrix locked, or at least provide better information around the link between that logbook and the training matrix so people are warned what their action will impact if they try to amend it.

Right at the beginning of having this system (when implementing a 1-2-1 process) I didn't realise that making any changes to this particular logbook would break the link to the training matrix and now it doesn't work at all.

I have been told through Access Support that this can't be fixed or reinstated, so it would be good to prevent other people experiencing the same issue.