diff --git a/addons/account_check_printing/models/account_payment.py b/addons/account_check_printing/models/account_payment.py
index ab6623b3068..d4ab83da890 100644
--- a/addons/account_check_printing/models/account_payment.py
+++ b/addons/account_check_printing/models/account_payment.py
@@ -45,7 +45,7 @@ class AccountPayment(models.Model):
     _inherit = "account.payment"
 
     check_amount_in_words = fields.Char(string="Amount in Words")
-    check_manual_sequencing = fields.Boolean(related='journal_id.check_manual_sequencing')
+    check_manual_sequencing = fields.Boolean(related='journal_id.check_manual_sequencing', readonly=1)
     check_number = fields.Integer(string="Check Number", readonly=True, copy=False,
         help="The selected journal is configured to print check numbers. If your pre-printed check paper already has numbers "
              "or if the current numbering is wrong, you can change it in the journal configuration page.")
@@ -82,10 +82,10 @@ class AccountPayment(models.Model):
 
     @api.model
     def create(self, vals):
-        if vals['payment_method_id'] == self.env.ref('account_check_printing.account_payment_method_check').id\
-                and vals.get('check_manual_sequencing'):
-            sequence = self.env['account.journal'].browse(vals['journal_id']).check_sequence_id
-            vals.update({'check_number': sequence.next_by_id()})
+        if vals['payment_method_id'] == self.env.ref('account_check_printing.account_payment_method_check').id:
+            journal = self.env['account.journal'].browse(vals['journal_id'])
+            if journal.check_manual_sequencing:
+                vals.update({'check_number': journal.check_sequence_id.next_by_id()})
         return super(AccountPayment, self).create(vals)
 
     @api.multi