Screen Time showing wrong and old device

I’m unable to see the screen time of my iPhone.

For some reason it shows my old device, which I’ve passed on to my mother (Mariannes iPhone). The device is no longer registered on my Apple ID. However her Apple ID is in my Family Sharing.

So how do I fix this? I’ve tried to turn off screen time on both devices, restarted my iPhone and checked for updates. Nothing worked.

I’m using an iPhone 15 Pro Max 256 GB, iOS 17.4.1.