Daily Labor Register Unable to Update (MAS200 version 4.40)

We are trying to update the Daily Labor Register /Update showing below:

but are getting the below error.  The problem is a missing employee number (really have no idea how the employee number is missing, but it is, possibly some sort of system glitch). 

Anyway, there is only one record causing the issue, but we are unable to access it in "Time Tracker Entry", so we can't delete it.  Can someone help please?

Thank you!