diff -r 8788981c95f8 -r cc3452d2dfa4 mercurial/configitems.py
--- a/mercurial/configitems.py	Thu Jan 14 21:34:12 2021 +0530
+++ b/mercurial/configitems.py	Mon Jan 18 21:37:20 2021 +0530
@@ -1098,21 +1098,6 @@
 )
 coreconfigitem(
     b'experimental',
-    b'sharesafe-auto-downgrade-shares',
-    default=False,
-)
-coreconfigitem(
-    b'experimental',
-    b'sharesafe-auto-upgrade-shares',
-    default=False,
-)
-coreconfigitem(
-    b'experimental',
-    b'sharesafe-auto-upgrade-fail-error',
-    default=False,
-)
-coreconfigitem(
-    b'experimental',
     b'sharesafe-warn-outdated-shares',
     default=True,
 )
@@ -1926,6 +1911,16 @@
     default=b'identity',
 )
 coreconfigitem(
+    b'share',
+    b'safe-mismatch.source-not-safe',
+    default=b'abort',
+)
+coreconfigitem(
+    b'share',
+    b'safe-mismatch.source-safe',
+    default=b'abort',
+)
+coreconfigitem(
     b'shelve',
     b'maxbackups',
     default=10,