How to rectify error "More than one user has been assigned the Marketing Default Approver role"

 This error is the standard system functionality, only one resource should be assigned to Marketing Default Approver Role

 Use the following SQL query to check the setup
 
 SELECT a.role_resource_id ,
   a.role_name,
   b.resource_name ,
   a.ROLE_TYPE_CODE,
   a.role_id
 FROM jtf_rs_defresroles_vl a,
   ams_jtf_rs_emp_v b
 WHERE a.role_type_code  IN ('MKTGAPPR','AMSAPPR')
 AND a.role_resource_type = 'RS_INDIVIDUAL'
 AND a.delete_flag        = 'N'
 AND TRUNC(SYSDATE) BETWEEN TRUNC(a.res_rl_start_date) AND
 TRUNC(NVL(a.res_rl_end_date,SYSDATE))
 AND a.role_resource_id = b.resource_id;

 Remove the duplicate and assign only one user to the Role Marketing Default Approver and try the flow again.