diff --git a/src/core/helpers/validation/validate-relation.helper.ts b/src/core/helpers/validation/validate-relation.helper.ts
index 0ae626b..2f9ed67 100644
--- a/src/core/helpers/validation/validate-relation.helper.ts
+++ b/src/core/helpers/validation/validate-relation.helper.ts
@@ -78,6 +78,10 @@ export class ValidateRelationHelper<Entity> {
       case '==':
         return column == value;
 
+      case 'in':
+        const candidates = Array.isArray(value) ? value : [value];
+        return candidates.includes(column);
+
       default:
         return column == value;
     }
diff --git a/src/modules/item-related/item/domain/usecases/managers/create-item.manager.ts b/src/modules/item-related/item/domain/usecases/managers/create-item.manager.ts
index ffe59fc..7ed59fb 100644
--- a/src/modules/item-related/item/domain/usecases/managers/create-item.manager.ts
+++ b/src/modules/item-related/item/domain/usecases/managers/create-item.manager.ts
@@ -39,7 +39,7 @@ export class CreateItemManager extends BaseCreateManager<ItemEntity> {
       ? [
           {
             relation: relation,
-            singleQuery: ['time_group_id', '!=', timeGroupId],
+            singleQuery: ['time_group_id', 'in', [timeGroupId, null]],
             message: `Gagal Update! Time group item dan bundling item tidak sama`,
           },
         ]
diff --git a/src/modules/item-related/item/domain/usecases/managers/update-item.manager.ts b/src/modules/item-related/item/domain/usecases/managers/update-item.manager.ts
index 2ece8e7..ebab591 100644
--- a/src/modules/item-related/item/domain/usecases/managers/update-item.manager.ts
+++ b/src/modules/item-related/item/domain/usecases/managers/update-item.manager.ts
@@ -50,7 +50,7 @@ export class UpdateItemManager extends BaseUpdateManager<ItemEntity> {
       ? [
           {
             relation: relation,
-            singleQuery: ['time_group_id', '!=', timeGroupId],
+            singleQuery: ['time_group_id', 'in', [timeGroupId, null]],
             message: `Gagal Update! Time group item dan bundling item tidak sama`,
           },
         ]