@Hereinafter Some context. This is not a revision. This is image 2 of 2 of the Pixiv album. The cropped version is image 1 of 2. They were posted together originally. For some reason the artist decided to delete this full image from that album, leaving just the cropped one by itself.
The filename of this post is 61925134_p1.jpg. Given that its the second image of the album, and that it was deleted, wouldn't the surviving image be the parent instead?