diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -1041,7 +1041,6 @@ def clean(repo, node, show_stats=True, q
     """forcibly switch the working directory to node, clobbering changes"""
     stats = updaterepo(repo, node, True)
     assert stats.unresolvedcount == 0
-    repo.vfs.unlinkpath(b'graftstate', ignoremissing=True)
     if show_stats:
         _showstats(repo, stats, quietempty)