Depending on your configuration and how the overrides were implemented, will change the answer
1) If you have a Controller or Virtual Controller and the changes were made in the Profile. In this case, remove the override from the Profile
2) If the APs are adopted to a Controller or Virtual Controller and the changes were made to the APs, the changes can be made on the Controllers to each adopted AP
3) If the are STANDALONE APs, the changes need to be made to each AP