diff --git a/app/models/protocol.rb b/app/models/protocol.rb
index 890335247..66a416f3e 100644
--- a/app/models/protocol.rb
+++ b/app/models/protocol.rb
@@ -351,7 +351,11 @@ class Protocol < ApplicationRecord
   end
 
   def parent_newer?
-    linked? && parent.newer_published_version_present?
+    linked? && (
+      parent.newer_published_version_present? ||
+        # backward compatibility with original implementation
+        parent.published_on > updated_at
+    )
   end
 
   def number_of_steps
diff --git a/db/migrate/20221125133611_add_protocol_versioning.rb b/db/migrate/20221125133611_add_protocol_versioning.rb
index da54292e1..93f32eb4f 100644
--- a/db/migrate/20221125133611_add_protocol_versioning.rb
+++ b/db/migrate/20221125133611_add_protocol_versioning.rb
@@ -36,9 +36,8 @@ class AddProtocolVersioning < ActiveRecord::Migration[6.1]
       ');'
     )
     execute(
-      'UPDATE "protocols" SET "published_on" = "created_at", "published_by_id" = "added_by_id" ' \
-      'WHERE "protocols"."protocol_type" = 5 ' \
-      'AND "protocols"."published_on" IS NULL;'
+      'UPDATE "protocols" SET "published_on" = "updated_at", "published_by_id" = "added_by_id" ' \
+      'WHERE "protocols"."protocol_type" = 5;'
     )
 
     execute(