diff -r 4b239acb23a0 -r 9e203cda3238 mercurial/configitems.py
--- a/mercurial/configitems.py	Tue Jun 14 15:45:37 2022 +0200
+++ b/mercurial/configitems.py	Tue Jun 14 15:11:36 2022 +0200
@@ -1409,6 +1409,12 @@
 )
 coreconfigitem(
     b'format',
+    b'use-share-safe.automatic-upgrade-of-mismatching-repositories:quiet',
+    default=False,
+    experimental=True,
+)
+coreconfigitem(
+    b'format',
     b'internal-phase',
     default=False,
     experimental=True,