diff --git a/CommonCore/SQL/src/de/steamwar/sql/SchematicNode.kt b/CommonCore/SQL/src/de/steamwar/sql/SchematicNode.kt
index e7f01cbd..7117a4b0 100644
--- a/CommonCore/SQL/src/de/steamwar/sql/SchematicNode.kt
+++ b/CommonCore/SQL/src/de/steamwar/sql/SchematicNode.kt
@@ -279,7 +279,7 @@ class SchematicNode(id: EntityID<Int>) : IntEntity(id) {
             }
             val index = s.lastIndexOf("/")
             val cacheKey = if (index == -1) "" else s.take(index)
-            tabCache[user.getId()]?.get(cacheKey)?.also { return it }
+            tabCache[user.getId()]?.get(cacheKey)?.also { return it.toMutableList() }
 
             val list = mutableListOf<String>()
             if (s.contains("/")) {