Thanks for the into both of you! Not sure why they would add in something like that with absolutely no purpose other than to drive people insane.

Its a game, every game i know has "relicts" in its content.
Unused Models, Scripts sounds...

if you use teh spawn commando or mods, know what you do, you left the "Protected" playground and such things are normal in the "wilderness"

Are you talking about those white mushrooms about half as tall as you that require the console to spawn? Those can't be rid of without a mod, they're notorious for people accidentally spawning them instead of yellow mushrooms and then just having to deal with it.

The mod in question is on the nexus called Glowing Mushroom Remover, if you need it.

These mushroom cant be destroyed.
https://www.reddit.com/r/valheim/comments/m3cv2d/spent_hours_building_and_accidentally_spawned/
So you have to install this mod and all credit to the modder for making it.
https://www.nexusmods.com/valheim/mods/933
I will never use it lol instead the yellow mushroom will do fine with a small stand crafted on a table.
https://steamcommunity.com/sharedfiles/filedetails/?id=2481598871