diff -r 90f047edab4f -r 562f7da122b5 mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py	Mon Jan 30 16:49:41 2023 -0500
+++ b/mercurial/bundlerepo.py	Mon Jan 30 16:59:15 2023 -0500
@@ -88,7 +88,7 @@
                     )
 
             if not self.index.has_node(deltabase):
-                raise LookupError(
+                raise error.LookupError(
                     deltabase, self.display_id, _(b'unknown delta base')
                 )