To reproduce:
1. Manually create lot "0000001" for a lot product
2. Create a MO for this product and click generate-serial button.
Validation error raised since we are trying to generate lot/sn "0000001"
again.
When useing action_generate_serial, ir.sequence always try create a
lot/sn in form "00000dd". If user already created the same one, the
generation will fail.
We already tried to avoid this issue for sn in _get_next_serial() by
finding the latest sn and create new one base on it.
To fix, we also allow _get_next_serial to be applied to lot.
Part of Tast-3187003
closesodoo/odoo#118481
X-original-commit: dc69748ea2698077782d839cf7da48e987f17ffc
Signed-off-by: William Henrotin (whe) <whe@odoo.com>
Signed-off-by: Yuchen Huang (yhu) <yhu@odoo.com>