v1.0.11-rc1

frontend/src/views/ZammadSyncPage.tsx

@@ -659,6 +659,25 @@ function addCachedChange(changes: ZammadSyncChange[], field: string, from: unkno
   }
 }
 
+const preservedExistingPreviewChangeFields = new Set([
+  "Fremdes Ticket",
+  "Fremder Zammad-Owner",
+  "Owner",
+  "Ticket-Zuordnung",
+  "Hinweis",
+  "Ticketnummer",
+  "TicketTracker-Zusammenführung"
+]);
+
+function preserveExistingPreviewChanges(item: ZammadSyncItem, changes: ZammadSyncChange[], fields: ZammadSyncExistingFields) {
+  const existingFields = new Set(changes.map((change) => change.field));
+
+  return [
+    ...item.changes.filter((change) => preservedExistingPreviewChangeFields.has(change.field) && !existingFields.has(change.field) && changeAllowedByFields(item, change, fields)),
+    ...changes
+  ];
+}
+
 function changesFromExistingPreviewCache(item: ZammadSyncItem, fields: ZammadSyncExistingFields) {
   if (!item.zammad) {
     return item.changes.filter((change) => changeAllowedByFields(item, change, fields));
@@ -756,7 +775,7 @@ function changesFromExistingPreviewCache(item: ZammadSyncItem, fields: ZammadSyn
     }
   }
 
-  return changes;
+  return preserveExistingPreviewChanges(item, changes, fields);
 }
 
 function rebuildZammadSyncResultFromItems(mode: ZammadSyncResult["mode"], items: ZammadSyncItem[], checked = items.length): ZammadSyncResult {