Orientation of bias frames

I was shooting last light, and at the very end, was taking 30 bias frames (mirrorless camera, so pretty easy). However, I noticed that all my lights, darks, and flats are in “portrait” mode, as is 29 of the bias frames. I must have tilted the camera for the last shot as it turned up horizontal (in exif, and as such is shown as portrait in file manager, and editing programs). Does this affect anything negatively (meaning I discard that bias frame) or would it have no impact?

No, it’s just a way to view images conveniently in pictures displayers.