diff --git a/atlas/models.py b/atlas/models.py
index f050b8ed..9ee1961f 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -929,7 +929,8 @@ class UncategorisedDicom(models.Model):
             self.basic_dicom_tags = self.get_basic_dicom_tags(dataset=ds)
 
             if duplicate is not None:
-                raise DuplicateDicom
+                if duplicate != self:
+                    raise DuplicateDicom
 
             
 
diff --git a/atlas/views.py b/atlas/views.py
index 70125ab3..f3c37e0a 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -389,6 +389,7 @@ def user_uploads(request, case_id: int | None = None):
     data = defaultdict(list)
     for d in dicoms:
         if d.basic_dicom_tags is None or not d.basic_dicom_tags:
+            d.basic_dicom_tags = d.get_basic_dicom_tags()
             d.save()
         tags = d.basic_dicom_tags