今天把5.7.12的备份恢复到5.7.17，启动数据库之后，遇到错误，如下：
[*]2017-02-09T08:01:58.275817Z 0 [ERROR] Info table has a problem with its key field(s). Table \'mysql.slave_master_info\' expected field #23 to be \'Channel_name\' but found \'Tls_versio ...
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