Null annotations

Hello there,
i uploaded a dataset in YOLO-Format and the missing labels are samples without any class (false data). Now there are like 1000 un-annotated images which cannot be added to the dataset, because i have to set every single image as null. Is there a possibility to mark all these images as null at once?

Furthermore, the annotation editor is so buggy and every time i click somewhere these helper dialogue things pop up (very annoying)!

I am using Chrome on Win11.