ZP-1060 Ignore incoming KOE updates from PatchItem.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/kopano/replybackimexporter.php

@@ -270,6 +270,12 @@ class ReplyBackImExporter implements IImportChanges, IExportChanges {
      * @return boolean
      */
     public function ImportMessageChange($id, $message) {
+        // Ignore incoming update events of KOE caused by PatchItem - ZP-1060
+        if ($id && $message instanceof SyncNote && !isset($message->asbody)) {
+            ZLog::Write(LOGLEVEL_DEBUG, "ReplyBackImExporter->ImportMessageChange(): KOE patch item update. Ignoring incoming update.");
+            return true;
+        }
+
         // data is going to be dropped, inform the user
         if (@constant('READ_ONLY_NOTIFY_LOST_DATA')) {
             try {