diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1114,7 +1114,7 @@ def resolverevlogstorevfsoptions(ui, req
 
     chainspan = ui.configbytes(b'experimental', b'maxdeltachainspan')
     if 0 <= chainspan:
-        options[b'maxdeltachainspan'] = chainspan
+        delta_config.max_deltachain_span = chainspan
 
     mmapindexthreshold = ui.configbytes(b'experimental', b'mmapindexthreshold')
     if mmapindexthreshold is not None:
diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -637,8 +637,6 @@ class revlog:
             comp_engine_opts[b'zlib.level'] = opts[b'zlib.level']
         if b'zstd.level' in opts:
             comp_engine_opts[b'zstd.level'] = opts[b'zstd.level']
-        if b'maxdeltachainspan' in opts:
-            self.delta_config.max_deltachain_span = opts[b'maxdeltachainspan']
         if self._mmaplargeindex and b'mmapindexthreshold' in opts:
             mmapindexthreshold = opts[b'mmapindexthreshold']
             self.data_config.mmap_index_threshold = mmapindexthreshold