Here's why:
* "Peers" already implies "fellow": Peers are people of the same age, status, or standing. The word "fellow" adds an unnecessary repetition.
* Better alternatives: You can simply use "peers" or "colleagues" to convey the same meaning. For example:
* Instead of "fellow peers," say "my peers."
* Instead of "we are fellow peers," say "we are colleagues."
Using "fellow peers" might be appropriate in very specific, informal situations, but it's generally best to avoid it in professional or formal writing.