diff --git a/packages/frontend-core/src/components/grid/stores/rows.js b/packages/frontend-core/src/components/grid/stores/rows.js
index 6e2fa1bcb8..5af3ef9d17 100644
--- a/packages/frontend-core/src/components/grid/stores/rows.js
+++ b/packages/frontend-core/src/components/grid/stores/rows.js
@@ -57,7 +57,11 @@ function getRelatedTableValues(row, field) {
       break
     case FieldType.ARRAY:
     case FieldType.OPTIONS:
-      result = row[field.related.field].flatMap(r => r[field.related.subField])
+      result = Array.from(
+        new Set(
+          row[field.related.field].flatMap(r => r[field.related.subField])
+        )
+      )
   }
 
   return result