diff --git a/api/app/services/model_service.py b/api/app/services/model_service.py
index ef3b80e2..ed4531f9 100644
--- a/api/app/services/model_service.py
+++ b/api/app/services/model_service.py
@@ -96,7 +96,7 @@ def get_summarized_percentages(self) -> TotPercentagesDTO:
         mq, mq_c = 0, 0
         dr, dr_c = 0, 0
         for _, metrics in models:
-            if metrics:
+            if metrics and metrics.percentages:
                 dq = dq + (
                     metrics.percentages['data_quality']['value']
                     if metrics.percentages['data_quality']['value'] >= 0