Delete default product types

Delete default product types

Hi,

I know this has been asked before - but it can't be right, that I can't delete the default product types under Assets?

We don't have IPS, NTP, Room Sensor, and we don't want to track our Racks etc. And because i don't want unnecessary information, I would like to delete these - but it seems I can't???

Why am i unable to delete them?
Can I delete them by going into the database?

Best regards
Peder

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