Plugin version in multi-repo but not ALL repos

I am looking for ideas on how to manage plugin upgrades in a multi-repo environment, but not in all repos. the code is:

plugins {
    id 'com.domain.CustomPlugin' version "${customVersion}"
}

And we define customVersion as a property in gradle.properties. But it’s not for every repo, and the same person could be working on some repos that need the upgrades but not all need the upgrades.

In a fast paced environment, the version can be incremented multiple times per week, this wears out the users who can’t keep up due to the number of repos they manage. Any advice?