Since new ORM in Odoo, the compute methods should always return values. In the case of return label in delivery, nothing was returned when there was no carrier on picking. So we are now setting the field to False when there are no carrier on picking. ISSUE-43270 closes odoo/odoo#43452 X-original-commit: 9bf52959a5afad01970f1ef39a64d6b3694abcc8 Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>