สอบถามเรื่องการ Insert และ Update Mysql ข้อมูลมันมีการ Insert ซ้ำอะครับ

	//approve change status W to A//

		
		$sql = "UPDATE absence SET status='A' WHERE absence_no=$document_id";
		$sqlquery=mysql_db_query($dbname, $sql);


		//update quota use day and count //

		$sql = "UPDATE quota_employee SET quota_use=quota_use+'$totalday' , count_use=count_use+1 WHERE employee_id=$employee_id and type_no = 'sick' " ;	
		$sqlquery=mysql_db_query($dbname, $sql);

			

		$Insertannual = " INSERT INTO annualday " ; 
		$Insertannual = $Insertannual . "(employee_id,year,month,";   
		$Insertannual = $Insertannual . " sick ".")";
		$Insertannual = $Insertannual . " VALUES(".$employee_id. ",'".$yearan."','".$monthan."',";
		$Insertannual = $Insertannual .$totalday." ".")";

		//echo "Insertannual==".$Insertannual."<br><br>";
		mysql_query($Insertannual);