diff --git a/plugins/3MFWriter/ThreeMFWorkspaceWriter.py b/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
index 1b24e59309..33f23b0274 100644
--- a/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
+++ b/plugins/3MFWriter/ThreeMFWorkspaceWriter.py
@@ -191,6 +191,10 @@ class ThreeMFWorkspaceWriter(WorkspaceWriter):
                 "capabilities",
                 "octoprint_api_key",
                 "is_online",
+                "cluster_api/auth_ids",
+                "cluster_api/auth_keys",
+                "cluster_api/nonce_counts",
+                "cluster_api/nonces",
             }
             serialized_data = container.serialize(ignored_metadata_keys = ignore_keys)