- Navigate to the Online Dashboard.
- Click your avatar in the top right corner and click My Devices.
- Click More Settings below the device you want to dissociate.
- Click Dissociate from all other accounts.
https://support.withings.com/hc/en-us/sections/6216071736593-Withings-Web-App
https://support.withings.com/hc/en-us/sections/200352996-First-Steps