When creating a wizard `stock.return.picking` and call `_onchange_picking_id`, the creation of return picking line will perform a write on move linked with it, due to `uom_id` being set as related with `readonly=False`. Set `readonly` to `True` to avoid it closes odoo/odoo#77242 X-original-commit: 6bdc99f8b67da069c8d26c73b5499d0b0c019c1e Signed-off-by: Tiffany Chang <tic@odoo.com>