diff --git a/src/core/helpers/validation/validate-relation.helper.ts b/src/core/helpers/validation/validate-relation.helper.ts
index ae5b929..0ae626b 100644
--- a/src/core/helpers/validation/validate-relation.helper.ts
+++ b/src/core/helpers/validation/validate-relation.helper.ts
@@ -52,10 +52,12 @@ export class ValidateRelationHelper<Entity> {
         `Failed! this data already connected to ${relation.relation}`;
 
       if (relation.singleQuery) {
+        const relationObject = data[relation.relation] ?? {};
+        const isRelationExist = `${relation.singleQuery[0]}` in relationObject;
         const relationColumn =
           data[relation.relation]?.[`${relation.singleQuery[0]}`];
         if (
-          // !!relationColumn &&
+          isRelationExist &&
           this.mappingValidator(
             relationColumn,
             relation.singleQuery[1],