Statechart Checks : (C1139) Transitions with priority settings which violate Statechart semantics

(C1139) Transitions with priority settings which violate Statechart semantics

Transitions who's priority settings contradict the Statechart hierarchical Transition Priority rule, by which priority is given to the transition for which the parent state common to both source and target states is of a higher hierarchical level.
Error In:
Correctness
Example:
In the following figure, according to the Statechart hierarchy Transition Priority rule the transition to S3 has higher priority than the transition to S2, but the user-defined priority is lower, and thus prioritization will be ignored.
Erroneous Elements:
Transitions