Add migration to make sort_order consecutive

database/migration-2.php

@@ -0,0 +1,17 @@
+<?php
+
+// Demote 'stamp' to a number that will be sequential to base off the sorting.
+
+$migrate = function() {
+    $query = mysql_query("SELECT distinct(machine) as machine FROM awfy_run") or die(mysql_error());
+    while($run = mysql_fetch_object($query)) {
+        mysql_query("SET @pos := 0;")or die (mysql_error());
+        mysql_query("UPDATE awfy_run
+                     SET sort_order = ( SELECT @pos := @pos + 1 )
+                     WHERE machine = ".$run->machine." ORDER BY sort_order ASC;") or die(mysql_error());
+    }
+};
+
+$rollback = function() {
+    // Impossible to undo.
+};