The version of a song you love may be the one its writer wishes they could replace.

The version you love may be the one its maker regrets. They hear the compromise, the take they settled for, the thing they would fix given another chance, while you hear the only version that ever existed for you. Both accounts are true, and neither has the standing to correct the other.

This applies to your own work and your own past. The things you are embarrassed by are often the things other people found useful, and your dissatisfaction is not more accurate than their experience just because you were closer to it. Before revising something loved, ask whether you are improving it or removing what people came for.