Hi SekeRob,
https://www.openstreetmap.org/relation/15687044 should be deleted. By the way that is the object validator warns about "being a too big islet". 
Why did you add the islet (https://www.openstreetmap.org/way/1102307128) to the wood MP (https://www.openstreetmap.org/relation/5450548)? It is much straight forward to simply tag the islet with `natural=wood` instead of extending MPs without need.
All the best,
skyper