A << derive >> Dependency must be from a UseCase or a Requirement towards a Requirement.
A << derive >> Dependency relates a derived Requirement to its source Requirement. This typically involves analysis to determine the multiple derived Requirements supported by a source Requirement. Derived Requirements generally correspond to Requirements at the next level of the system hierarchy.
If you have a << derive >> Dependency which is not from a UseCase or a Requirement toward a Requirement, you should delete it.