diff --git a/oci/remote/oci_stack_native.py b/oci/remote/oci_stack_native.py
index adbf6dda..9c7d238d 100644
--- a/oci/remote/oci_stack_native.py
+++ b/oci/remote/oci_stack_native.py
@@ -410,7 +410,7 @@ class NativeAdapter:
         if Path('/etc/pve/lxc/%s.conf' % vmid).exists():
             member_tx.stop(vmid)
 
-    def backup(self, vmid, identity):
+    def backup(self, vmid, transaction_id):
         self.validate(self.plan)
         base = self.work_base()
         if base != self.journal.parent and not (self.journal.parent / work_backup.MARK).exists():
@@ -420,7 +420,7 @@ class NativeAdapter:
                      f"{self.records[self.plan['primary_vmid']]['deployment'].get(work_backup.KEY)}")
         directory = base / ('backup-%s' % vmid)
         private_directory(directory)
-        config = member_tx.owned(vmid, identity).decode()
+        config = member_tx.owned(vmid, self.records[vmid]['installation_id']).decode()
         carried.carry_backup(self.root, vmid, self.records[vmid], config)
         archive = member_tx.verified_backup(vmid, directory, 'zstd',
                                             translate('The backup of a member could not be identified'))
diff --git a/oci/tests/test_stack_backup_carried_metadata.py b/oci/tests/test_stack_backup_carried_metadata.py
index 02cc3558..a8c702b7 100644
--- a/oci/tests/test_stack_backup_carried_metadata.py
+++ b/oci/tests/test_stack_backup_carried_metadata.py
@@ -17,7 +17,7 @@ class StackBackupCarriedMetadataTests(unittest.TestCase):
         adapter.records={4901:{'vmid':4901,'installation_id':'original','status':'installed'}}
         return adapter
 
-    def test_restore_metadata_is_verified_before_archive_creation(self):
+    def test_transaction_id_does_not_replace_container_identity_before_archive_creation(self):
         with tempfile.TemporaryDirectory() as folder:
             adapter=self.adapter(folder);events=[]
             archive=Path(folder)/'archive.tar.zst'
@@ -26,7 +26,7 @@ class StackBackupCarriedMetadataTests(unittest.TestCase):
                  patch.object(native.carried,'carry_backup',side_effect=lambda *args:events.append(('carry',args)),create=True), \
                  patch.object(native.member_tx,'verified_backup',side_effect=lambda *args:events.append(('backup',args)) or archive), \
                  patch.object(native.member_tx,'filehash',return_value='verified-sha'):
-                result=adapter.backup(4901,'original')
+                result=adapter.backup(4901,'different-transaction-id')
             owned.assert_called_once_with(4901,'original')
             self.assertEqual([event[0] for event in events],['carry','backup'])
             self.assertEqual(events[0][1],(adapter.root,4901,adapter.records[4901],'validated original config'))
@@ -40,5 +40,5 @@ class StackBackupCarriedMetadataTests(unittest.TestCase):
                  patch.object(native.carried,'carry_backup',side_effect=ValueError('metadata not verified'),create=True), \
                  patch.object(native.member_tx,'verified_backup') as backup:
                 with self.assertRaisesRegex(ValueError,'metadata not verified'):
-                    adapter.backup(4901,'original')
+                    adapter.backup(4901,'different-transaction-id')
             backup.assert_not_called()