diff --git a/src/components/FormDialog.vue b/src/components/FormDialog.vue
index dab9e7fc..ee1cea71 100644
--- a/src/components/FormDialog.vue
+++ b/src/components/FormDialog.vue
@@ -63,6 +63,7 @@ watch(provinceId, async (v) => {
 });
 
 watch(districtId, async (v) => {
+  subDistrictId.value = undefined;
   await fetchSubDistrict(v);
 });
 
@@ -72,6 +73,15 @@ watch(subDistrictId, async (v) => {
       ?.filter((x) => x.id === v)
       .map((x) => x.zipCode)[0] ?? '';
 });
+
+watch(provinceId, (v) => {
+  if (v) {
+    addrOptions.value.districtOps = [];
+    addrOptions.value.subDistrictOps = [];
+    districtId.value = undefined;
+    subDistrictId.value = undefined;
+  }
+});
 </script>
 <template>
   <q-dialog full-width v-model="modal">