remove instances where a pointer is used in a foreach loop for value (#7108)

app/call_centers/app_defaults.php

@@ -45,7 +45,7 @@ if ($domains_processed == 1) {
 		$sql .= "and (t.call_center_queue_uuid is null or t.call_center_agent_uuid is null) ";
 		$tiers = $database->select($sql, null, 'all');
 		if (!empty($tiers)) {
-			foreach ($tiers as $index => &$row) {
+			foreach ($tiers as $index => $row) {
 				if ($row['call_center_queue_uuid'] == null && $row['queue_uuid'] != null) {
 					$array['call_center_tiers'][$index]['call_center_queue_uuid'] = $row['queue_uuid'];
 				}