How to increase exposure of a frame without shifting forward the frames in front of it

Hi, im making a roughly 3 minute long animation to some music, and it’s really annoying when after increasing the exposure of a frame in one shot i have to readjust the timing of all the shots after that. Would it be possible for the increased exposure to replace empty frames instead of pushing forward everything in the timeline?

I have a master peg that connects everything and I “close it” to move everything within it foward, like moving a group altogether.