The Sony A1 has a new feature, one that is also seen in the Sony A7 III: pixel mapping.
Sony doesn’t explain what it does very well, but it appears that the camera takes a dark frame (with the shutter closed), then maps out hot pixels.
If [Pixel Mapping] is not performed regularly, bright spots may appear in recorded images.
If [Auto Pixel Mapping] is set to [Off], perform [Pixel Mapping] regularly. We recommend that you perform the operation once every three days.
Hot pixels are a real thing, and if you take your camera on an airplane trip, chances are pretty good of killing a pixel or two via cosmic rays—not a joke.