diff --git a/setup/tools/sqlgen/itemset.ss.php b/setup/tools/sqlgen/itemset.ss.php
index b89d5839..edd9bceb 100644
--- a/setup/tools/sqlgen/itemset.ss.php
+++ b/setup/tools/sqlgen/itemset.ss.php
@@ -296,15 +296,17 @@ CLISetup::registerSetup("sql", new class extends SetupScript
                     $sorted[$k][$data['slot']] = $data;
             }
 
-            foreach ($sorted as $i => $set)
+            $i = 0;
+            foreach ($sorted as $set)
             {
                 ksort($set);
 
                 $vRow = $row;
                 $this->getDataFromSet($vRow, $set);
 
-                // is virtual set
-                if ($i)
+                // only assign a virtual setId to followup sets or the ItemSummary tool can't find the setboni
+                // is this the correct way..?
+                if ($i++)
                     $vRow['id'] = --$virtualId;
 
                 DB::Aowow()->query('INSERT INTO ?_itemset (?#) VALUES (?a)', array_keys($vRow), array_values($vRow));
diff --git a/setup/updates/1741361137_01.sql b/setup/updates/1741361137_01.sql
new file mode 100644
index 00000000..92ad74d7
--- /dev/null
+++ b/setup/updates/1741361137_01.sql
@@ -0,0 +1 @@
+UPDATE `aowow_dbversion` SET `sql` = CONCAT(IFNULL(`sql`, ''), ' itemset'), `build` = CONCAT(IFNULL(`build`, ''), ' itemsets');
diff --git a/static/js/Summary.js b/static/js/Summary.js
index e929b50c..429c9a86 100644
--- a/static/js/Summary.js
+++ b/static/js/Summary.js
@@ -2483,6 +2483,7 @@ Summary.prototype = {
             if (g_items[p]) {
                 var
                     s = g_items[p].jsonequip.itemset,
+                    t = g_items[p].jsonequip.slot,
                     _ = g_itemsets[s];
 
                 if (_) {
@@ -2491,7 +2492,9 @@ Summary.prototype = {
                     if (itemsetpcs[s] == null) {
                         itemsetpcs[s] = {};
                     }
-                    itemsetpcs[s][p] = 1;
+                    // aowow: group by slot, not itemId, to avoid multiple items of the same slot activating boni
+                    // itemsetpcs[s][p] = 1;
+                    itemsetpcs[s][t] = 1;
                     itemsetbak[s] = _;
                 }
             }