How To Create An Audit Table

Can anyone help, I am able to create a trigger that will populate a audit table everytime one of my tables columns data changes, but I have an applications from another user that has a stored proceudre and when that is called from an application it hit the original table twice, so the audit table will get a duplicate entry.   How do you prevent an AUDIT TABLE from inserting a duplicate entry Here is my trigger:Create TRIGGER tg_audit_task_order_awardees on xxxfor INSERT,UPDATE,DELETE as

 INSERT INTO audit_task_order_awardees(  audit_log_type,  to_awardee,  solicitation_id,  contract_id,  order_number,  amount,  show_public,  audit_changedatetime,  audit_user)   Select  'OLD',  del.to_awardee,  del.solicitation_id,  del.contract_id,  del.order_number,  del.amount,  del.show_public,  getdate(),  del.modified_user FROM deleted del

 

/* for a new record */

 INSERT INTO audit_task_order_awardees(  audit_log_type,  to_awardee,  solicitation_id,  contract_id,  order_number,  amount,  show_public,  audit_changedatetime,  audit_user) Select   'NEW',  ins.to_awardee,  ins.solicitation_id,  ins.contract_id,  ins.order_number,  ins.amount,  ins.show_public,  getdate(),  ins.modified_user FROM inserted ins