diff --git a/vulnerabilities/migrations/0055_remove_changelogs_with_same_data_different_software_version.py b/vulnerabilities/migrations/0055_remove_changelogs_with_same_data_different_software_version.py
new file mode 100644
index 000000000..59f5da903
--- /dev/null
+++ b/vulnerabilities/migrations/0055_remove_changelogs_with_same_data_different_software_version.py
@@ -0,0 +1,52 @@
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# VulnerableCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/nexB/vulnerablecode for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+from django.db import migrations
+from django.db import models
+
+
+class Migration(migrations.Migration):
+
+    def remove_duped_changelogs(apps, schema_editor):
+        PackageChangeLog = apps.get_model("vulnerabilities", "PackageChangeLog")
+        VulnerabilityChangeLog = apps.get_model("vulnerabilities", "VulnerabilityChangeLog")
+
+        models_list = [PackageChangeLog, VulnerabilityChangeLog]
+
+        for model in models_list:
+        # Identify duplicate records based on actor_name, action_type, and source_url
+            duplicate_records = model.objects.values('actor_name', 'action_type', 'source_url').annotate(count=models.Count('id')).filter(count__gt=1)
+
+            to_be_deleted = list()
+
+            for duplicate_set in duplicate_records:
+                # Get the records for the current duplicate set
+                records_to_delete = model.objects.filter(
+                    actor_name=duplicate_set['actor_name'],
+                    action_type=duplicate_set['action_type'],
+                    source_url=duplicate_set['source_url']
+                ).order_by('-software_version')
+
+                # Keep the record with the older software version
+                record_to_keep = records_to_delete.last()
+
+                # Delete the records with the newer software version
+                to_be_deleted.extend(records_to_delete.exclude(id=record_to_keep.id))
+
+            to_be_deleted = list(set(to_be_deleted))
+            to_be_deleted = [rec.id for rec in to_be_deleted]
+            model.objects.filter(id__in = to_be_deleted).delete()
+
+    dependencies = [
+        ("vulnerabilities", "0054_alter_packagechangelog_software_version_and_more"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_duped_changelogs, reverse_code=migrations.RunPython.noop),
+    ]
diff --git a/vulnerabilities/migrations/0056_alter_packagechangelog_unique_together_and_more.py b/vulnerabilities/migrations/0056_alter_packagechangelog_unique_together_and_more.py
new file mode 100644
index 000000000..3b35e273e
--- /dev/null
+++ b/vulnerabilities/migrations/0056_alter_packagechangelog_unique_together_and_more.py
@@ -0,0 +1,21 @@
+# Generated by Django 4.1.13 on 2024-01-22 09:42
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("vulnerabilities", "0055_remove_changelogs_with_same_data_different_software_version"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="packagechangelog",
+            unique_together={("action_time", "actor_name", "action_type", "source_url")},
+        ),
+        migrations.AlterUniqueTogether(
+            name="vulnerabilitychangelog",
+            unique_together={("action_time", "actor_name", "action_type", "source_url")},
+        ),
+    ]
diff --git a/vulnerabilities/models.py b/vulnerabilities/models.py
index 3dca94cc5..cf6f4412a 100644
--- a/vulnerabilities/models.py
+++ b/vulnerabilities/models.py
@@ -1145,6 +1145,7 @@ def get_iso_time(self):
     class Meta:
         abstract = True
         ordering = ("-action_time",)
+        unique_together = ("action_time", "actor_name", "action_type", "source_url")
 
 
 class VulnerabilityHistoryManager(models.Manager):
diff --git a/vulnerabilities/tests/test_data_migrations.py b/vulnerabilities/tests/test_data_migrations.py
index 7d8e6b258..2d7521a3f 100644
--- a/vulnerabilities/tests/test_data_migrations.py
+++ b/vulnerabilities/tests/test_data_migrations.py
@@ -610,3 +610,53 @@ def setUpBeforeMigration(self, apps):
     def test_removal_of_duped_purls(self):
         Package = apps.get_model("vulnerabilities", "Package")
         assert Package.objects.count() == 1
+
+
+class TestRemoveDupedChangeLogWithSameData(TestMigrations):
+    app_name = "vulnerabilities"
+    migrate_from = "0054_alter_packagechangelog_software_version_and_more"
+    migrate_to = "0055_remove_changelogs_with_same_data_different_software_version"
+
+    def setUpBeforeMigration(self, apps):
+        PackageChangeLog = apps.get_model("vulnerabilities", "PackageChangeLog")
+        VulnerabilityChangeLog = apps.get_model("vulnerabilities", "VulnerabilityChangeLog")
+        Package = apps.get_model("vulnerabilities", "Package")
+        Vulnerability = apps.get_model("vulnerabilities", "Vulnerability")
+        pkg1 = Package.objects.create(type="nginx", name="nginx", qualifiers={"os": "windows"})
+        vuln = Vulnerability.objects.create(summary="NEW")
+        PackageChangeLog.objects.create(
+            actor_name="Nginx",
+            action_type=1,
+            source_url="test",
+            software_version="1",
+            package=pkg1,
+            related_vulnerability=vuln,
+        )
+        PackageChangeLog.objects.create(
+            actor_name="Nginx",
+            action_type=1,
+            source_url="test",
+            software_version="2",
+            package=pkg1,
+            related_vulnerability=vuln,
+        )
+        VulnerabilityChangeLog.objects.create(
+            actor_name="Nginx",
+            action_type=1,
+            source_url="test",
+            software_version="2",
+            vulnerability=vuln,
+        )
+        VulnerabilityChangeLog.objects.create(
+            actor_name="Nginx",
+            action_type=1,
+            source_url="test",
+            software_version="1",
+            vulnerability=vuln,
+        )
+
+    def test_removal_of_changelog(self):
+        PackageChangeLog = apps.get_model("vulnerabilities", "PackageChangeLog")
+        VulnerabilityChangeLog = apps.get_model("vulnerabilities", "VulnerabilityChangeLog")
+        assert PackageChangeLog.objects.all().count() == 1
+        assert VulnerabilityChangeLog.objects.all().count() == 1