diff --git a/src/components/04_product-service/WorkManagementComponent.vue b/src/components/04_product-service/WorkManagementComponent.vue
index b95d5617..89043f55 100644
--- a/src/components/04_product-service/WorkManagementComponent.vue
+++ b/src/components/04_product-service/WorkManagementComponent.vue
@@ -454,7 +454,7 @@ watch(
                           dense
                           type="number"
                           v-model="product.installmentNo"
-                          min="0"
+                          min="1"
                         />
                       </span>
                     </span>
diff --git a/src/pages/04_product-service/MainPage.vue b/src/pages/04_product-service/MainPage.vue
index be02086d..6bd01c34 100644
--- a/src/pages/04_product-service/MainPage.vue
+++ b/src/pages/04_product-service/MainPage.vue
@@ -282,7 +282,7 @@ const formService = ref<ServiceCreate>({
   name: '',
   code: '',
   productGroupId: '',
-  installments: 0,
+  installments: 1,
 });
 
 const hideStat = ref(false);
@@ -935,8 +935,6 @@ async function assignFormService(id: string) {
       if (workflowRet) currWorkflow.value = workflowRet;
     }
 
-    console.log(res);
-
     prevService.value = {
       code: res.code,
       name: res.name,
@@ -1082,7 +1080,7 @@ function clearFormService() {
     work: [],
     status: undefined,
     productGroupId: '',
-    installments: 0,
+    installments: 1,
   };
   tempWorkItems.value = [];
   workItems.value = [];
@@ -1252,7 +1250,7 @@ function submitAddWorkProduct() {
     if (!productExists) {
       workItems.value[currentWorkIndex.value].product.push({
         ...i,
-        installmentNo: !!formService.value.installments ? 1 : 0,
+        installmentNo: !!formService.value.installments ? 1 : 1,
         nameEn: '',
       });
       workItems.value[currentWorkIndex.value].attributes.workflowStep.forEach(
@@ -4085,7 +4083,7 @@ watch(
             style="width: 54px"
             dense
             outlined
-            min="0"
+            min="1"
             class="split-pay q-mx-sm"
             input-class="text-caption text-right"
             type="number"