Re-pair or repair a pair of things

Anytime there's potential confusion over the meaning of a word starting with the prefix re, it's fine to employ a hyphen after the prefix.

In doing so, the re must signify do something again.

Examples include

Re-treat (to treat again) rather than concede ground on the battlefield or attend a spirituality getaway

Re-tire (put tires on a car again) rather than go to bed or be done with one's career

Re-cover (to cover again) rather than get better from illness

Etc

Your situation falls within this sphere of practice. In speech there would be no hyphen and the meaning would be given by context, perceived speaker's intention, lingo, and perhaps intonation.

Resources include: Grammar Book

Grammar Monster