Steps to reproduce: - activate `group_stock_reception_report` in settings - activate `auto_show_reception_report` for the "Receipts" operation type - create a receipt w/ any product + confirm - create a return w/any product + confirm - select both the receipt + return in the (Operations > Transfers) list view > action > Validate Expected result: both pickings are validated Actual result: stacktrace due to expected singleton ValueError enterprise PR : https://github.com/odoo/enterprise/pull/37518 task-3204596 closes odoo/odoo#120190 X-original-commit: b2ac4b2f30e15c4b8a50628798b2fc39d7d43331 Related: odoo/enterprise#40570 Signed-off-by: Tiffany Chang <tic@odoo.com>