Field Type does not match (Code / OemCode)

Hi all,

I face a strange issue. NAV 2013 R2 Database. A certified Add-on from a Partner is checking the Field Type of a field at a certain point in time. And it throws an Error Message that the Field Type doesn't match. It checks for Field Type OemCode, but my Field is Type Code. And the Option OemCode doesn't even exist in the selection.

I know it's somehow related to this topic https://krikinav.wordpress.com/2016/05/06/field-version-list-in-the-object-table/. But I don't know how to solve it.

Any ideas or explanations?