diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index 4cb382b0..091b266f 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -238,7 +238,6 @@ class MIODoSerializer(CustomModelSerializer):
                   'belong_dept', 'type', 'inout_date', 'mgroup', 'mio_user']
         extra_kwargs = {'inout_date': {'required': True}, 
                         'do_user': {'required': True}, 'belong_dept': {'required': False}}
-        read_only_fields = ["number"]
 
     def validate(self, attrs):
         if 'mgroup' in attrs and attrs['mgroup']:
@@ -294,7 +293,6 @@ class MIOPurSerializer(CustomModelSerializer):
         model = MIO
         fields = ['id', 'number', 'note', 'pu_order', 'inout_date', 'supplier', 'mio_user']
         extra_kwargs = {'inout_date': {'required': True}}
-        read_only_fields = ["number"]
 
     def create(self, validated_data):
         validated_data['type'] = MIO.MIO_TYPE_PUR_IN
@@ -323,7 +321,6 @@ class MIOOtherSerializer(CustomModelSerializer):
         fields = ['id', 'number', 'note', 'supplier',
                   'customer', 'type', 'inout_date', 'mio_user']
         extra_kwargs = {'inout_date': {'required': True}}
-        read_only_fields = ["number"]
 
     def create(self, validated_data):
         if not validated_data.get("number", None):
diff --git a/apps/pm/serializers.py b/apps/pm/serializers.py
index ce728f5e..38317ef4 100644
--- a/apps/pm/serializers.py
+++ b/apps/pm/serializers.py
@@ -24,7 +24,6 @@ class UtaskSerializer(CustomModelSerializer):
     class Meta:
         model = Utask
         fields = '__all__'
-        read_only_fields = ["number"]
 
     def create(self, validated_data):
         if not validated_data.get('number', None):