diff --git a/src/Database/PostUpdate.php b/src/Database/PostUpdate.php
index e50250ff5f..88bec31b74 100644
--- a/src/Database/PostUpdate.php
+++ b/src/Database/PostUpdate.php
@@ -34,6 +34,9 @@ class PostUpdate
 		if (!self::update1274()) {
 			return;
 		}
+		if (!self::update1275()) {
+			return;
+		}
 	}
 
 	/**
@@ -272,6 +275,45 @@ class PostUpdate
 		}
 		dba::close($items);
 
+		logger("Processed rows: " . $rows, LOGGER_DEBUG);
+		return true;
+	}
+	/**
+	 * @brief update the "item-activity" table
+	 *
+	 * @return bool "true" when the job is done
+	 */
+	private static function update1275()
+	{
+		// Was the script completed?
+		if (Config::get("system", "post_update_version") >= 1275) {
+			return true;
+		}
+
+		logger("Start", LOGGER_DEBUG);
+
+		$fields = ['id', 'verb'];
+
+		$condition = ["`iaid` IS NULL AND NOT `icid` IS NULL AND `verb` IN (?, ?, ?, ?, ?)",
+			ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
+
+		$params = ['limit' => 10000];
+		$items = Item::select($fields, $condition, $params);
+
+		if (!DBM::is_result($items)) {
+			Config::set("system", "post_update_version", 1275);
+			logger("Done", LOGGER_DEBUG);
+			return true;
+		}
+
+		$rows = 0;
+
+		while ($item = Item::fetch($items)) {
+			Item::update($item, ['id' => $item['id']]);
+			++$rows;
+		}
+		dba::close($items);
+
 		logger("Processed rows: " . $rows, LOGGER_DEBUG);
 		return true;
 	}