diff --git a/src/modules/04_registry/components/Information/OldName.vue b/src/modules/04_registry/components/Information/OldName.vue
index 9039d1256..794d9b072 100644
--- a/src/modules/04_registry/components/Information/OldName.vue
+++ b/src/modules/04_registry/components/Information/OldName.vue
@@ -102,7 +102,7 @@
                 :hide-dropdown-icon="!edit"
                 hide-bottom-space
                 :class="getClass(edit)"
-                :readonly="!edit"
+                :readonly="!edit || status != 'prefix'"
                 :borderless="!edit"
                 :rules="[(val:string) => !!val || `${'กรุณาเลือก คำนำหน้าชื่อ'}`]"
                 :outlined="edit"
@@ -128,7 +128,7 @@
                 :outlined="edit"
                 dense
                 lazy-rules
-                :readonly="!edit || status == 'lastName'"
+                :readonly="!edit || status == 'lastName' || status == 'prefix'"
                 :borderless="!edit"
                 v-model="firstName"
                 :rules="[(val) => !!val || `${'กรุณากรอกชื่อ'}`]"
@@ -143,7 +143,7 @@
                 :outlined="edit"
                 dense
                 lazy-rules
-                :readonly="!edit || status == 'firstName'"
+                :readonly="!edit || status == 'firstName' || status == 'prefix'"
                 :borderless="!edit"
                 v-model="lastName"
                 :rules="[(val) => !!val || `${'กรุณากรอกนามสกุล'}`]"