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You could try going to Document > Settings > PDF Properties > Hyperlinks and set "Backreferences" to "Off". Does that work? If not it would help if you posted a minimal example, please see https://wiki.lyx.org/FAQ/MinimalExample

Thanks! That worked. I didn't think that they would be under a sub ...

I cannot figure out how to prevent LyX from automatically adding links of the page numbers that cite entries in the bibliography. This is resulting in extra numbers after each entry.

For example:
Let's say there is a bib file with this as its contents:
@article{example_article,
author = {Generic ...