I think the officer was wrong telling you it was mandatory to move your car. You cannot disable the offending car (e.g. calmping it would be illegal), but there

I think the officer was wrong telling you it was mandatory to move your car. You cannot disable the offending car (e.g. calmping it would be illegal), but there is no obligation to arrange your private property in such a way that they could exit it. He was probably confused by the rule that you are not allowed to block an exit ("uitrit") of someones driveway of proprety by parking in their way. But that rule does not apply if you're parking on your own private property.