[fix] type_contribution_id is readonly

models/account_invoice.py

@@ -34,7 +34,8 @@ class ScopAccountInvoice(models.Model):
     is_contribution = fields.Boolean("Cotisation", default=False)
     type_contribution_id = fields.Many2one(
         comodel_name="scop.contribution.type",
-        string="Type de cotisation")
+        string="Type de cotisation",
+        readonly=True)
     partner_ur_id = fields.Many2one(
         comodel_name='union.regionale',
         string='UR Adhérent',
@@ -50,6 +51,9 @@ class ScopAccountInvoice(models.Model):
         default='4',
         required=True)
 
+    # ------------------------------------------------------
+    # Override Parent
+    # ------------------------------------------------------
     @api.multi
     def action_invoice_open(self):
         """