SERVER-74032 introduced new logic to ensure robust generation of change stream events upon a chunk migration commit.
The functionality involves persisting state according to a backwards incompatible schema, so that the original change also added a https://github.com/10gen/mongo/blame/27185c75f90ef3f4e16f4c915302eda79aab5bfc/src/mongo/db/commands/set_feature_compatibility_version_command.cpp#L876-L886 to setFeatureCompatibilityVersion.
Nevertheless, today such a condition is incorrectly placed - since it will only be executed in case the gSnapshotFCVInDDLCoordinators is disabled.