Invalid Field Definition - Unable to set up cascade update (1 Viewer)

[Cam D]

My database won't work when i try to make a relationship between 2 tables not only does it come up with that it is a one-one relationship but it also comes up with the error message "invalid field definition "vid ID" in definition of field or relationship" i do not understand what this means or how to fix the problem but this is for my GCSE ICT Project 2 work so it is very important.