Sony A7 problem

In a burst of seven photos, one had one longitudinal pink line, one had two lines and one had three lines. I am posting the last here. Can someone explain this please? I took two further bursts to see if the thing happened again, but it didn't.

Two things come to mind. The lesser issue would have the card as the culprit, or a (temporary) issue with the card reader/writer in the camera. Worst case scenario is that these lines are an indication of a failing sensor. At the very least, I would format the card before using it again, or possibly not use that one at all again.

Thank you, Dieter. I shall format the card immediately.