Code Smell Shotgun Surgery
Shotgun Surgery resembles Divergent Change but is actually the opposite smell. Divergent Change is when many changes are made to a single class. Shotgun Surgery refers to when a single change is made to multiple classes simultaneously.
Signs and Symptoms
Making any modifications requires that you make many small changes to many different classes.
Reasons for the Problem
A single responsibility has been split up among a large number of classes. This can happen after overzealous application of Divergent Change.
If moving code to the same class leaves the original classes almost empty, try to get rid of these now-redundant classes via Inline Class.
Less code duplication.