Ticket #20263: 20263.patch

wp-admin/includes/upgrade.php

@@ -1568 +1568 @@
                         case 'unique':
                         case 'key':
                                 $validfield = false;
-                                $indices[] = trim(trim($fld), ", \n");
+                                $indices[] = trim(trim(str_replace('`', '', $fld)), ", \n");
                                 break;
                         }
                         $fld = trim($fld);
 
                         // If it's a valid field, add it to the field array
                         if ($validfield) {
-                                $cfields[strtolower($fieldname)] = trim($fld, ", \n");
+                                $cfields[strtolower($fieldname)] = trim(str_replace('`', '', $fld), ", \n");
                         }
                 }