diff --git a/bims/custom_admin/source_reference.py b/bims/custom_admin/source_reference.py
index 4b4a9aaaa..0b53210b1 100644
--- a/bims/custom_admin/source_reference.py
+++ b/bims/custom_admin/source_reference.py
@@ -119,12 +119,6 @@ def merge_source_references(self, request, queryset):
                 messages.ERROR)
             return
 
-        elif source_type >= 2:
-            self.message_user(
-                request, 'Source references should have same type', messages.ERROR
-            )
-            return
-
         merge_source_references(primary_source_reference=verified.first(),
                                 source_reference_list=queryset)
 
diff --git a/bims/tests/test_source_reference.py b/bims/tests/test_source_reference.py
index 5bda8f48b..4f983972c 100644
--- a/bims/tests/test_source_reference.py
+++ b/bims/tests/test_source_reference.py
@@ -188,6 +188,7 @@ def test_merge_source_reference(self):
             note='test', source=self.entry)
         database = SourceReferenceDatabaseF.create()
         document = SourceReferenceDocumentF.create()
+        unpublished = SourceReferenceF.create(note='unpublished')
         source_document_id = document.source.id
 
         BiologicalCollectionRecordF.create(
@@ -199,6 +200,9 @@ def test_merge_source_reference(self):
         BiologicalCollectionRecordF.create(
             source_reference=document
         )
+        BiologicalCollectionRecordF.create(
+            source_reference=unpublished
+        )
         self.assertTrue(
             Document.objects.filter(id=source_document_id).exists()
         )
@@ -209,7 +213,7 @@ def test_merge_source_reference(self):
             1
         )
         source_references = SourceReference.objects.filter(
-            id__in=[database.id, document.id]
+            id__in=[database.id, document.id, unpublished.id]
         )
         merge_source_references(
             primary_source_reference=biblio,
@@ -219,7 +223,7 @@ def test_merge_source_reference(self):
             BiologicalCollectionRecord.objects.filter(
                 source_reference=biblio
             ).count(),
-            3
+            4
         )
         self.assertFalse(
             BiologicalCollectionRecord.objects.filter(
@@ -239,6 +243,11 @@ def test_merge_source_reference(self):
                 id=document.id
             ).exists()
         )
+        self.assertFalse(
+            SourceReference.objects.filter(
+                id=unpublished.id
+            ).exists()
+        )
 
 
 class TestRemoveRecordsBySourceReference(FastTenantTestCase):