Hi – I’m getting the same kind of error referenced in this thread https://forum.mendix.com/link/questions/8714. Any solution? I double-checked my excel import definition, and it says to make that field only a key for the main object, not reference object. Can the Excel importer not handle a key field in the main object if it is not in the reference object?
Found the solution: I had to define a key field as applicable to BOTH reference and main object.