diff -r fa00c407d61c -r 2064bbf7a1d5 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Aug 10 14:16:55 2022 -0400
+++ b/mercurial/configitems.py	Wed Aug 10 14:39:28 2022 -0400
@@ -1432,6 +1432,12 @@
     experimental=True,
 )
 coreconfigitem(
+    b'shelve',
+    b'store',
+    default='internal',
+    experimental=True,
+)
+coreconfigitem(
     b'fsmonitor',
     b'warn_when_unused',
     default=True,