"The image part with relationship rID8 was not found"

I have a word document in Word 2016 composed of text and some images that were pasted into the document using the snipping tool (cut and paste). All of a sudden most of these images are gone and when you open up the file it says "The image part with relationship rID8 was not found" where the images used to be (see attached). The file is about 25 pages long and has a lot of images. Does anyone know how to fix this?

Thanks