Subform RunTime error -- cannot move to "ID"

J

jwr

I created a query, inserted this into my form. When I enter the info in the
subform and attempt to continue on in the form, error appears:

Cannot moveon to "CustomerID". This is the option that I selected for
my child and master link.

What is the best way to create a subform and not have link errors? I
cannot determine why this does not work.
 
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