Issue ----- Users cannot create a new opportunity on the portal if they don't have any. Fix ----- Apply the same change in 17.0 than 58356928dd9cf07158bca4e8c1ce0dcf5177d0b9 did in following versions. opw-3809571 closes odoo/odoo#161870 Signed-off-by: Tanguy Quéguineur (taqu) <taqu@odoo.com>