diff --git a/src/db/sqlite/SqliteCapacitor.php b/src/db/sqlite/SqliteCapacitor.php
index d1fbfef..babe130 100644
--- a/src/db/sqlite/SqliteCapacitor.php
+++ b/src/db/sqlite/SqliteCapacitor.php
@@ -116,7 +116,9 @@ class SqliteCapacitor extends CapacitorStorage {
       $updates = func::_call($context, [$item, $values, $row, ...$args]);
       if (is_array($updates)) {
         if (array_key_exists("_item", $updates)) {
-          $updates["_item"] = serialize($updates["_item"]);
+          $_item = serialize($updates["_item"]);
+          $updates["_item"] = $_item;
+          $updates["_sum"] = sha1($_item);
           if (!array_key_exists("_modified", $updates)) {
             $updates["_modified"] = $now;
           }