diff -r 4039cad0d8ff -r 5eb5b866e517 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Mon May 03 12:28:47 2021 +0200
+++ b/mercurial/localrepo.py	Mon May 03 12:28:58 2021 +0200
@@ -3531,8 +3531,6 @@
     revlogv2 = ui.config(b'experimental', b'revlogv2')
     if revlogv2 == b'enable-unstable-format-and-corrupt-my-data':
         requirements.discard(requirementsmod.REVLOGV1_REQUIREMENT)
-        # generaldelta is implied by revlogv2.
-        requirements.discard(requirementsmod.GENERALDELTA_REQUIREMENT)
         requirements.add(requirementsmod.REVLOGV2_REQUIREMENT)
     # experimental config: format.internal-phase
     if ui.configbool(b'format', b'internal-phase'):