diff -r ee7e106b372b -r 8583d138f436 mercurial/bundle2.py
--- a/mercurial/bundle2.py	Fri Sep 20 21:31:58 2024 -0400
+++ b/mercurial/bundle2.py	Mon Jul 08 22:46:04 2024 +0200
@@ -1804,7 +1804,7 @@
         addpartrevbranchcache(repo, bundler, outgoing)
 
     if opts.get(b'obsolescence', False):
-        obsmarkers = repo.obsstore.relevantmarkers(outgoing.missing)
+        obsmarkers = repo.obsstore.relevantmarkers(nodes=outgoing.missing)
         buildobsmarkerspart(
             bundler,
             obsmarkers,