diff -r 4c041c71ec01 -r 64cd1496bb70 mercurial/manifest.py
--- a/mercurial/manifest.py	Tue Apr 06 05:20:24 2021 +0200
+++ b/mercurial/manifest.py	Thu Apr 08 19:00:21 2021 +0200
@@ -1625,7 +1625,6 @@
         self.index = self._revlog.index
         self.version = self._revlog.version
         self._generaldelta = self._revlog._generaldelta
-        self._revlog.revlog_kind = b'manifest'
 
     def _setupmanifestcachehooks(self, repo):
         """Persist the manifestfulltextcache on lock release"""