[消息：保护] => SQLSTATE [23000]：完整性约束违规：1062重复条目'AD'关键'PRIMARY'，查询是：INSERT INTO`directory_country`（`country_id`，`iso2_code`，`iso3_code`）VALUES （？，？，？）
试图解决，谢谢
your trying to add values but the values are not quoted.
Try adding quotes around your ?, although I have no idea why your trying to add a question mark as a country name....
