How to delete image in the background from all pages at once ?

As you can see there is a low opacity image in the background of page which I selected (blue bounding box can be seen). It is present in each page.
I can't remove this using tools like redact or background image remove or watermark because Acrobat pro DC 2021 can't detect it as watermark or as background image. Redaction will redact text in front of it. I tried sanitisation also.
The only is using Edit pdf option, select it and delete it one by one from each page. (there are more than 300 pages)
Is there any way of selecting these bounding boxes (present on each page) at once ?
or any other way of deleting this image from each page ?
Thanks and regards.



