diff -r a51d345f1404 -r 6b40aac4da8e mercurial/upgrade_utils/engine.py
--- a/mercurial/upgrade_utils/engine.py	Wed Dec 16 14:06:24 2020 +0530
+++ b/mercurial/upgrade_utils/engine.py	Wed Dec 16 14:16:10 2020 +0530
@@ -451,13 +451,13 @@
         )
     )
 
-    if upgrade_op.has_action(b're-delta-all'):
+    if upgrade_op.has_upgrade_action(b're-delta-all'):
         deltareuse = revlog.revlog.DELTAREUSENEVER
-    elif upgrade_op.has_action(b're-delta-parent'):
+    elif upgrade_op.has_upgrade_action(b're-delta-parent'):
         deltareuse = revlog.revlog.DELTAREUSESAMEREVS
-    elif upgrade_op.has_action(b're-delta-multibase'):
+    elif upgrade_op.has_upgrade_action(b're-delta-multibase'):
         deltareuse = revlog.revlog.DELTAREUSESAMEREVS
-    elif upgrade_op.has_action(b're-delta-fulladd'):
+    elif upgrade_op.has_upgrade_action(b're-delta-fulladd'):
         deltareuse = revlog.revlog.DELTAREUSEFULLADD
     else:
         deltareuse = revlog.revlog.DELTAREUSEALWAYS
@@ -469,7 +469,7 @@
             dstrepo,
             tr,
             deltareuse,
-            upgrade_op.has_action(b're-delta-multibase'),
+            upgrade_op.has_upgrade_action(b're-delta-multibase'),
             revlogs=upgrade_op.revlogs_to_process,
         )