Scenario ConflictEqualPriorityNotPermitted: requirement SCD0050 not validated in case Modify activated flight with pre-existing conflict

[mickmis]

Observed behavior
In scenario ConflictEqualPriorityNotPermitted, case Modify activated flight with pre-existing conflict no requirement is being validated.
It is supposed to validate SCD0050, same as the previous case. This case and the previous are basically two subcases of SCD0050: maybe we should consider splitting the requirement in subrequirements?