--- a/admin/linkAmendments.php
+++ b/admin/linkAmendments.php
@@ -1,15 +1,67 @@
 <?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 " . $row['parentCN'] .
+if (php_sapi_name() != "cli") {
+    
+//auth();
+}
+$query = 'update contractnotice set "parentCN" = null where "parentCN" = \'0\'';
+$query = $conn->prepare($query);
+	$query->execute();
+        $query = 'update contractnotice set "supplierABN" = null where "supplierABN" = \'0\'';
+$query = $conn->prepare($query);
+	$query->execute();
+$query = 'SELECT c."CNID",c."parentCN",p."childCN" FROM contractnotice as c  LEFT OUTER JOIN contractnotice as p on c."parentCN" = p."CNID"
+WHERE
+c."parentCN" IS NOT NULL AND p."childCN" IS NULL ';
+$query = $conn->prepare($query);
+	$query->execute();
+		databaseError($conn->errorInfo());
+foreach ($query->fetchAll() as $row) {
+    if ($row['parentCN'] != 0) {
+  $conn->exec('UPDATE contractnotice SET "childCN" = \'' .
+			 $row['CNID'] . '\' where "CNID" = \'' .
+			 $row['parentCN'] . '\';');
+echo 'UPDATE contractnotice SET "childCN" = \'' .
+			 $row['CNID'] . '\' 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 keeps childCN = 0
+$query = 'SELECT "parentCN", array_agg("CNID"), count(*) from contractnotice WHERE "parentCN" IN
+(
+      SELECT "parentCN" 
+      FROM contractnotice
+      GROUP BY "parentCN" 
+      HAVING COUNT(*) > 1 
+      AND "parentCN" IS NOT NULL
+)
+AND "childCN" IS NULL
+GROUP BY "parentCN" having count(*) > 1';
+$query = $conn->prepare($query);
+	$query->execute();
+		databaseError($conn->errorInfo());
+foreach ($query->fetchAll() as $row) {
+	$cnids = explode(",",str_replace(Array("{","}"),"",$row['array_agg']));
+	$last_cnid = array_pop($cnids);
+	foreach ($cnids as $cnid) {
+  $conn->exec('UPDATE contractnotice SET "childCN" = \'' .
+			 $last_cnid . '\' where "CNID" = \'' .
+			 $cnid . '\';');
+			
+    $errors = $conn->errorInfo();
+              
+              if ($errors[1] == 7 || $errors[1] ==0)
+                  echo $cnid . " linked to latest child " . $last_cnid .
+  "<br>\n";
+  else print_r($errors);
+}
+}
+
 ?>
+