--- a/mercurial/revlog.py	Wed Jan 15 15:47:31 2020 +0100
+++ b/mercurial/revlog.py	Wed Jan 15 15:47:40 2020 +0100
@@ -1965,6 +1965,7 @@
             # manager
 
         tr.replace(self.indexfile, trindex * self._io.size)
+        nodemaputil.setup_persistent_nodemap(tr, self)
         self._chunkclear()
 
     def _nodeduplicatecallback(self, transaction, node):