Mysql child record ref Id is null

I create child records by clicking “new” in the inline view of the parent detail view. In the child form the parent ref Id is already selected in a drop down. When I don’t change the parent ref id selection and hit “save” the stored parent ref id will be null. Only when I change the parent ref id by hand it will be stored correctly.

Why is that? Bug?

Eventually what I need in the child form is the parent ref id hidden and not editable but this ends in null too…

Do you have a Valid If expression in the Ref column of the parent table? Is so, what is the expression?

I do not have any expression there.

Hmm! Sound like a bug to me. I suggest you contact directly for help.

Weird. It works now.

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