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orders_by_company = defaultdict(list)
for order in self.filtered(lambda o: o.l10n_fr_secure_sequence_number):
orders_by_company[order.company_id.id].append(order)
for company_id, orders in orders_by_company.items():
# Since sequence number can't be zero, we don't consider
# it as a posible previous sequence number
prev_seq = [o.l10n_fr_secure_sequence_number - 1 for o in orders if o.l10n_fr_secure_sequence_number > 1]
prev_orders = self.search([
('state', 'in', ['paid', 'done']),
('company_id', '=', company_id),
('l10n_fr_secure_sequence_number', 'in', prev_seq),
])
prev_map = defaultdict(list)
for po in prev_orders:
prev_map[po.l10n_fr_secure_sequence_number].append(po)
for order in orders:
match = prev_map.get(order.l10n_fr_secure_sequence_number - 1, [])
if len(match) > 1:
raise UserError(_('An error occurred when computing the inalterability. Impossible to get the unique previous posted point of sale order.'))
order.previous_order_id = match[0] if match else False
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