Statechart Checks : (C1033) Default transitions with illegal sources

(C1033) Default transitions with illegal sources

Transitions have multiple sources and one of them is either a conditional connector or a history connector.
Error In:
Correctness
Example:
In the following figure, the compound transition entering S4 (whose source set consists of the default connector in S1 and the state S2) is an erroneous transition.
Erroneous Elements:
Components of the erroneous transitions