--- a/hgext/fix.py	Wed Jan 26 10:11:01 2022 -0800
+++ b/hgext/fix.py	Thu Feb 11 22:52:43 2021 -0800
@@ -149,7 +149,6 @@
     mdiff,
     merge,
     mergestate as mergestatemod,
-    obsolete,
     pycompat,
     registrar,
     rewriteutil,
@@ -463,8 +462,6 @@
         revs = set(logcmdutil.revrange(repo, opts[b'rev']))
         if opts.get(b'working_dir'):
             revs.add(wdirrev)
-        for rev in revs:
-            checkfixablectx(ui, repo, repo[rev])
     # Allow fixing only wdir() even if there's an unfinished operation
     if not (len(revs) == 1 and wdirrev in revs):
         cmdutil.checkunfinished(repo)
@@ -481,16 +478,6 @@
     return revs
 
 
-def checkfixablectx(ui, repo, ctx):
-    """Aborts if the revision shouldn't be replaced with a fixed one."""
-    if ctx.obsolete():
-        # It would be better to actually check if the revision has a successor.
-        if not obsolete.isenabled(repo, obsolete.allowdivergenceopt):
-            raise error.Abort(
-                b'fixing obsolete revision could cause divergence'
-            )
-
-
 def pathstofix(ui, repo, pats, opts, match, basectxs, fixctx):
     """Returns the set of files that should be fixed in a context
 

--- a/tests/test-fix.t	Wed Jan 26 10:11:01 2022 -0800
+++ b/tests/test-fix.t	Thu Feb 11 22:52:43 2021 -0800
@@ -1169,8 +1169,9 @@
   $ hg commit -Aqm "foo"
   $ hg ci --amend -m rewritten
   $ hg --hidden fix -r 0
-  abort: fixing obsolete revision could cause divergence
-  [255]
+  abort: cannot fix b87e30dbf19b, as that creates content-divergence with 2e007a78dfb8
+  (add --verbose for details or see 'hg help evolution.instability')
+  [10]
 
   $ hg --hidden fix -r 0 --config experimental.evolution.allowdivergence=true
   2 new content-divergent changesets