Why are some page filenames appended with digabit####?

When publishers supersede a part number in only specific books, but the part belongs to the same page across media, Documoto has to duplicate the page that the part belongs to in order for there to be a version with the new part number in the selected media and a version that retained the older part number in any media that were excluded.

Although the pages appear duplicative (with the exception of the digabit#### number), the BOMs will differ per the supersession.

Below is a screenshot of where Publishers can specify to only supersede a part in media that match certain criteria:

In this example, if part number 551156CE only existed on one page, but that page existed in two books and only one book matched the criteria set upon supersession – Documoto would duplicate the page that the part belonged to so that one version could exist in the media that was excluded with part number 551156CE and the other that matched the criteria would have the superseded value of 551137.