Retrieve System.Owner

Hi, I set the option to 'Store owner' in my domain model at an existing entity. From all objects created from now the owner will be stored.   That said, I would like to also retrieve the owners of the existing (older) objects. Ofcourse I don't know if this is possible, because I didn't store their owner before. Anyone knows if there is a workaround (e.g. with a conversionflow) in Mendix to retrieve the owner of objects?   Thanks!    
1 answers

You cannot retrieve them because they were never stored (currently empty / Null). And to my knowledge, there's no workaround to that.