diff --git a/models/booking_event_registration.py b/models/booking_event_registration.py
index fe59184..107508c 100644
--- a/models/booking_event_registration.py
+++ b/models/booking_event_registration.py
@@ -210,6 +210,12 @@ class EventRegistration(models.Model):
                 invoice.state='draft'
                 invoice_id=self.invoice_id
                 self.invoice_id=False
+                 #suppression des paiements liés à la facture
+                self.env['account.payment'].sudo().search([('move_id','=',int(invoice_id))]).unlink()
+
+                #suppression des écritures comptables lié à la facture
+                self.env['account.move.line'].sudo().search([('move_id','=',int(invoice_id))]).unlink()
+                #suppression de la facture
                 self.env['account.move'].sudo().search([('id','=',int(invoice_id))]).unlink()
         
         invoice=self.env['account.move'].sudo().search([('id','=',int(self.down_payment_invoice_id))])