Requirement to adjust the BPM approval rule to skip one level

Hi Team,

I have a requirement to adjust the BPM approval rule to skip one level of management. Specifically, when a requisition is submitted by a recruiter, the approval should follow this path:

Hiring Manager (HM)
Line Manager Director (skipping the Hiring Manager's Line Manager)
In other words, instead of routing the requisition through the Hiring Manager's Line Manager, it should be directly approved by the Line Manager Director.

I tried this rule it does not work the approval goes to both Hiring Manager's Line Manager and Line manager Director
HierarchyBuilder.getManagerOfHierarchyPrincipal("supervisory",HierarchyBuilder.getManager("supervisory",Task.payload.transactionApprovalRequest.HiringManagerUsername,-1,null,"LINE_MANAGER"))