diff --git a/src/apps/api/views/submissions.py b/src/apps/api/views/submissions.py
index 1a7405151..aaf7386b6 100644
--- a/src/apps/api/views/submissions.py
+++ b/src/apps/api/views/submissions.py
@@ -68,7 +68,7 @@ def get_queryset(self):
                     Q(owner=self.request.user) |
                     Q(phase__competition__created_by=self.request.user) |
                     Q(phase__competition__collaborators__in=[self.request.user.pk])
-                )
+                ).distinct()
             qs = qs.select_related(
                 'phase',
                 'phase__competition',