Merge PR #1837 into 16.0

Signed-off-by pedrobaeza

account_invoice_show_currency_rate/models/account_move.py

@@ -35,7 +35,7 @@ def _compute_currency_rate_amount(self):
             lines = item.line_ids.filtered(lambda x: x.amount_currency > 0)
             if item.state == "posted" and lines:
                 amount_currency_positive = sum(lines.mapped("amount_currency"))
-                total_debit = sum(item.line_ids.mapped("debit"))
+                total_debit = sum(lines.mapped("debit"))
                 item.currency_rate_amount = item.currency_id.round(
                     amount_currency_positive / total_debit
                 )