Hello and welcome to Apple Support Communities, klimma!
We understand you want to remove watchOS beta from your Apple Watch. We'd be happy to provide information to help you address this.
Use the steps outlined here: Update your Apple Watch
"If you installed an iOS or watchOS beta or developer seed
- Before you update, remove the beta profile from your device. To view and remove profiles:
- Open the Apple Watch app on your iPhone, tap the My Watch tab, then go to General > Profiles. Tap the beta profile that you want to remove, then tap Delete Profile. Enter your iPhone passcode if requested.
- Open the Settings app on your iPhone, then tap General > Profiles & Device Management. Tap the beta profile that you want to remove, then tap Delete profile. Enter your iPhone passcode if requested.
- After you remove the profiles, restart both devices and check for the update again.
To continue using the public beta of iOS, you can install the beta profile again."
Have a great day!