diff --git a/lib/db/upgrade.php b/lib/db/upgrade.php
index 02047847e5d..f636b6046f0 100644
--- a/lib/db/upgrade.php
+++ b/lib/db/upgrade.php
@@ -1578,16 +1578,19 @@ function xmldb_main_upgrade($oldversion=0) {
         build_context_rel();
     }
 
-    if ($result && $oldversion < 2007080201) {
+    if ($result && $oldversion < 2007080202) {
 
     /// Define index tagiditem (not unique) to be dropped form tag_instance
         $table = new XMLDBTable('tag_instance');
         $index = new XMLDBIndex('tagiditem');
+        $index->setAttributes(XMLDB_INDEX_NOTUNIQUE, array('tagid', 'itemtype', 'itemid'));
 
     /// Launch drop index tagiditem
         drop_index($table, $index);
 
    /// Define index tagiditem (unique) to be added to tag_instance
+        $table = new XMLDBTable('tag_instance');
+        $index = new XMLDBIndex('tagiditem');
         $index->setAttributes(XMLDB_INDEX_UNIQUE, array('tagid', 'itemtype', 'itemid'));
 
     /// Launch add index tagiditem
diff --git a/version.php b/version.php
index 7fc6b4980cc..c9d1123b1a5 100644
--- a/version.php
+++ b/version.php
@@ -6,7 +6,7 @@
 // This is compared against the values stored in the database to determine
 // whether upgrades should be performed (see lib/db/*.php)
 
-    $version = 2007080201;  // YYYYMMDD = date
+    $version = 2007080202;  // YYYYMMDD = date
                             //       XY = increments within a single day
 
     $release = '1.9 dev';   // Human-friendly version name