Now I was able to find the first post:(My Wayspot is on the wrong spot. The painted rocks).
The same POI was in the database twice:
- The painted rock at 56.716407, 10.114459
- Kålormsten at 56.716356, 10.114531.
They were duplicates. The first one (The painted rock) was deleted. Kålormsten is still in the database but does not show because of all the other way spots in the area.