diff --git a/cg/store/crud/read.py b/cg/store/crud/read.py
index 5d2c212178..dc6c669b3a 100644
--- a/cg/store/crud/read.py
+++ b/cg/store/crud/read.py
@@ -1663,10 +1663,9 @@ def get_uploaded_related_dna_cases(self, rna_case: Case) -> list[Case]:
         """Returns all uploaded DNA cases ids related to the given RNA case."""
 
         related_dna_cases: list[Case] = []
+        collaborators: set[Customer] = rna_case.customer.collaborators
         for rna_sample in rna_case.samples:
 
-            collaborators: set[Customer] = rna_case.customer.collaborators
-
             related_dna_samples_query: Query = self._get_related_samples_query(
                 sample=rna_sample,
                 prep_categories=DNA_PREP_CATEGORIES,