diff --git a/apps/wr/app/store/matDmd/coMatRvw/type.tsx b/apps/wr/app/store/matDmd/coMatRvw/type.tsx
index 34990c6b3..58d539538 100644
--- a/apps/wr/app/store/matDmd/coMatRvw/type.tsx
+++ b/apps/wr/app/store/matDmd/coMatRvw/type.tsx
@@ -98,7 +98,7 @@ export const DmdCoReqSchema = z.object({
     z.object({
       ruseUtztnFcltNm: z.string(),
       ruseUtztnFcltCd: z.string(),
-    })
+    }).nullish()
   ).nullish(),
   totalConstCost: z.number().nullish(),
 });