diff --git a/issue2331002_1_10001.diff b/issue2331002_1_10001.diff
deleted file mode 100644
index fe560f8..0000000
--- a/issue2331002_1_10001.diff
+++ /dev/null
@@ -1,32 +0,0 @@
-Index: invoice.py
-===================================================================
-
---- ./trytond/trytond/modules/account_invoice/invoice.py
-+++ ./trytond/trytond/modules/account_invoice/invoice.py
-@@ -1049,24 +1049,11 @@
-         default['invoice_report_cache'] = None
-         default['invoice_report_format'] = None
-         default['payment_lines'] = None
--        default['lines'] = None
--        default['taxes'] = None
-         default.setdefault('invoice_date', None)
-         default.setdefault('accounting_date', None)
-         default['lines_to_pay'] = None
-         default.setdefault('origin', None)
--
--        new_invoices = []
--        for invoice in invoices:
--            new_invoice, = super(Invoice, cls).copy([invoice], default=default)
--            Line.copy(invoice.lines, default={
--                    'invoice': new_invoice.id,
--                    })
--            Tax.copy(invoice.taxes, default={
--                    'invoice': new_invoice.id,
--                    })
--            new_invoices.append(new_invoice)
--        return new_invoices
-+        return super(Invoice, cls).copy(invoices, default=default)
- 
-     @classmethod
-     def validate(cls, invoices):
-