Merge pull request #911 from expsa/project_test

Update project_invoice.py

odex25_project/project_base/models/project_invoice.py

@@ -236,7 +236,7 @@ class ProjectInvoice(models.Model):
     def action_set_to_draft(self):
         self.ensure_one()
         if self.invoice_id.state=='draft':
-            self.invoice_id=False or [(5, 0, 0)]
+            self.invoice_id=False
             self.state = 'draft'
         else:
             raise UserError(_("Kindly The invoice is not in draft state, so it cannot be unlinked."))