diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a9bd33ca..101dd4c5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,8 @@
 # Changelog
 
-## v4.2.1
-
-### Fixed
+- Fixed a bug in the deep copy of plans where the old identifier was being copied into the new plan. We now copy the generated id of the new plan to the identifier field.
 - Fixed bar chart click function in the Usage dashboard (GitHub issue #3443)
-## v4.2.0
+
 
 **Note this upgrade is mainly a migration from Bootstrap 3 to Bootstrap 5.** 
 
diff --git a/app/models/plan.rb b/app/models/plan.rb
index 7626bba20..f2fb6a290 100644
--- a/app/models/plan.rb
+++ b/app/models/plan.rb
@@ -255,6 +255,9 @@ def self.deep_copy(plan)
     plan_copy.title = "Copy of #{plan.title}"
     plan_copy.feedback_requested = false
     plan_copy.save!
+    # Copy newly generated Id to the identifier
+    plan_copy.identifier = plan_copy.id.to_s
+    plan.save!
     plan.answers.each do |answer|
       answer_copy = Answer.deep_copy(answer)
       answer_copy.plan_id = plan_copy.id