diff --git a/src/modules/15_development/components/Target.vue b/src/modules/15_development/components/Target.vue
index bc0474b9d..9bf3e4e70 100644
--- a/src/modules/15_development/components/Target.vue
+++ b/src/modules/15_development/components/Target.vue
@@ -145,7 +145,7 @@ const groupSubOp = ref<DataOption[]>([
 ]);
 
 const isEdit = ref<boolean>(false);
-const rowIndex = ref<number>(null);
+const rowIndex = ref<number | null>(null);
 const modalGroupTarget = ref<boolean>(false);
 const newModalGroupTarget = ref<boolean>(false);
 const modalRelate = ref<boolean>(false);