--- a/admin/linkAmendments.php
+++ b/admin/linkAmendments.php
@@ -1,15 +1,29 @@
 <?php
 include_once ("../lib/common.inc.php");
-$query = "SELECT CNID,parentCN,amendmentReason FROM `contractnotice` WHERE
-parentCN > 0 ";
-$result = mysql_query($query);
-while ($row = mysql_fetch_array($result, MYSQL_BOTH)) {
-  $result2 = mysql_query("UPDATE contractnotice SET childCN = '" .
-			 $row['CNID'] . "', amendmentReason = '" .
-			 $row['amendmentReason'] . "' where CNID = '" .
-			 $row['parentCN'] . "';");
-  if ($result2) echo $row['CNID'] . " linked to parent " . $row['parentCN'] .
+$query = 'SELECT c."CNID",c."parentCN",c."amendmentReason",p."childCN" FROM contractnotice as c  LEFT OUTER JOIN contractnotice as p on c."parentCN" = p."CNID"
+WHERE
+c."parentCN" > 0 AND p."childCN" IS NULL ';
+$query = $conn->prepare($query);
+	$query->execute();
+	if (!$query) {
+		databaseError($conn->errorInfo());
+	}
+foreach ($query->fetchAll() as $row) {
+  $conn->exec('UPDATE contractnotice SET "childCN" = \'' .
+			 $row['CNID'] . '\', "amendmentReason" = \'' .
+			 $row['amendmentReason'] . '\' where "CNID" = \'' .
+			 $row['parentCN'] . '\';');
+			 echo 'UPDATE contractnotice SET "childCN" = \'' .
+			 $row['CNID'] . '\', "amendmentReason" = \'' .
+			 $row['amendmentReason'] . '\' where "CNID" = \'' .
+			 $row['parentCN'] . '\';';
+    $errors = $conn->errorInfo();
+              
+              if ($errors[1] == 7 || $errors[1] ==0)
+                  echo $row['CNID'] . " linked to parent " . $row['parentCN'] .
   "<br>\n";
-  else "error" . mysql_error();
+  else print_r($errors);
+
 }
+// also need to eliminate CN 100528/100529 - check for double parent CNs with no childCN, latest sequent CN id wins childCN = 0
 ?>