diff -r e4b31016e194 -r 411d591e0a27 mercurial/configitems.py
--- a/mercurial/configitems.py	Tue Apr 05 05:20:05 2022 +0200
+++ b/mercurial/configitems.py	Tue Mar 22 14:14:52 2022 +0100
@@ -1278,6 +1278,12 @@
 )
 coreconfigitem(
     b'format',
+    b'use-dirstate-v2.automatic-upgrade-of-mismatching-repositories',
+    default=False,
+    experimental=True,
+)
+coreconfigitem(
+    b'format',
     b'use-dirstate-tracked-hint',
     default=False,
     experimental=True,