SQL Query for element pay values getting duplicated

Summary:

Dear All

I am trying develop a BIP Report which will fetch the values for elements processed on certain period of time , I prepare the Query for overtime , but when I run I am getting duplicate values , I mean I am getting two rows of same values and total amount is doubled ,Please refer the attached query , am I missing anything or any joints

SELECT prrv.RESULT_VALUE "OVERTIME" ,PAPF.PERSON_ID,ppa.effective_date,PPA.PAYROLL_ACTION_ID,pet.element_name

		   FROM 	pay_element_types_tl pet,

		            PAY_RUN_RESULTS prr,

							PAY_RUN_RESULT_VALUES prrv,

							PAY_PAYROLL_REL_ACTIONS ppra,