Fix the isuue that manual consumption is not correctly calculated when backorder/split/merge. closes odoo/odoo#115429 X-original-commit: d72ddd80d8a6aaa808c07db685972a1c05e8d6a4 Signed-off-by: Tiffany Chang <tic@odoo.com> Signed-off-by: Yuchen Huang (yhu) <yhu@odoo.com>