diff --git a/tests/ui/mock/alert_summaries.json b/tests/ui/mock/alert_summaries.json
index d559855bd35..61ef457c60e 100644
--- a/tests/ui/mock/alert_summaries.json
+++ b/tests/ui/mock/alert_summaries.json
@@ -136,6 +136,7 @@
       }
     ],
     "related_alerts": [],
+    "duplicated_summaries_ids": [],
     "status": 0,
     "bug_number": null,
     "bug_updated": null,
@@ -223,6 +224,7 @@
       }
     ],
     "related_alerts": [],
+    "duplicated_summaries_ids": [],
     "status": 0,
     "bug_number": null,
     "bug_updated": null,
@@ -358,6 +360,7 @@
       }
     ],
     "related_alerts": [],
+    "duplicated_summaries_ids": [],
     "status": 0,
     "bug_number": null,
     "bug_updated": null,
diff --git a/tests/webapp/api/test_performance_alertsummary_api.py b/tests/webapp/api/test_performance_alertsummary_api.py
index bc80cf84330..a892b4a913a 100644
--- a/tests/webapp/api/test_performance_alertsummary_api.py
+++ b/tests/webapp/api/test_performance_alertsummary_api.py
@@ -94,6 +94,7 @@ def test_alert_summaries_get(
         "push_timestamp",
         "prev_push_revision",
         "performance_tags",
+        "duplicated_summaries_ids",
     }
     assert len(resp.json()["results"][0]["alerts"]) == 1
     assert set(resp.json()["results"][0]["alerts"][0].keys()) == {
@@ -174,6 +175,7 @@ def test_alert_summaries_get_onhold(
         "push_timestamp",
         "prev_push_revision",
         "performance_tags",
+        "duplicated_summaries_ids",
     }
     assert len(resp.json()["results"][0]["alerts"]) == 1
     assert set(resp.json()["results"][0]["alerts"][0].keys()) == {
diff --git a/treeherder/webapp/api/performance_serializers.py b/treeherder/webapp/api/performance_serializers.py
index 7101e78798a..d5a86b35705 100644
--- a/treeherder/webapp/api/performance_serializers.py
+++ b/treeherder/webapp/api/performance_serializers.py
@@ -293,6 +293,7 @@ class PerformanceAlertSummarySerializer(serializers.ModelSerializer):
         queryset=User.objects.all(),
     )
     assignee_email = serializers.SerializerMethodField()
+    duplicated_summaries_ids = serializers.SerializerMethodField()
     # marking these fields as readonly, the user should not be modifying them
     # (after the item is first created, where we don't use this serializer
     # class)
@@ -310,6 +311,13 @@ def update(self, instance, validated_data):
     def get_assignee_email(self, performance_alert_summary):
         return getattr(performance_alert_summary.assignee, "email", None)
 
+    def get_duplicated_summaries_ids(self, performance_alert_summary):
+        return (
+            PerformanceAlertSummary.objects.filter(push=performance_alert_summary.push)
+            .exclude(id=performance_alert_summary.id)
+            .values_list("id", flat=True)
+        )
+
     class Meta:
         model = PerformanceAlertSummary
         fields = [
@@ -336,6 +344,7 @@ class Meta:
             "assignee_username",
             "assignee_email",
             "performance_tags",
+            "duplicated_summaries_ids",
         ]
 
 
diff --git a/ui/perfherder/alerts/AlertHeader.jsx b/ui/perfherder/alerts/AlertHeader.jsx
index 23b418f2c3d..10ffb2e3eac 100644
--- a/ui/perfherder/alerts/AlertHeader.jsx
+++ b/ui/perfherder/alerts/AlertHeader.jsx
@@ -1,5 +1,6 @@
 import React, { useState } from 'react';
 import PropTypes from 'prop-types';
+import { Link } from 'react-router-dom';
 import {
   UncontrolledDropdown,
   DropdownMenu,
@@ -240,6 +241,24 @@ const AlertHeader = ({
           />
         </Col>
       </Row>
+      {alertSummary.duplicated_summaries_ids.length > 0 && (
+        <Row>
+          Duplicated summaries:
+          {alertSummary.duplicated_summaries_ids.map((id, index) => (
+            <Link
+              className="text-dark mr-1"
+              target="_blank"
+              to={`./alerts?id=${id}&hideDwnToInv=0`}
+              id={`duplicated alert summary ${id.toString()} `}
+              style={{ marginLeft: '5px' }}
+            >
+              Alert #{id}
+              {alertSummary.duplicated_summaries_ids.length - 1 !== index &&
+                ', '}
+            </Link>
+          ))}
+        </Row>
+      )}
       <Row>
         {performanceTags.length > 0 && (
           <Col className="p-0" xs="auto">