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Incompatible/nonstandard server version or connection protocol detected (5.5.62).
A connection to this database can be established but some MySQL Workbench features may not work properly since the database is not fully compatible with the supported versions of MySQL.
MySQL Workbench is developed and tested for MySQL Server versions 5.6, 5.7 and 8.0.
For MySQL Server older than 5.6, please use MySQL Workbench version 6.3.
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WARNING: Server public key has changed. It means either you’re under attack or the administrator has changed the key. New public fingerprint is: 69:c7:e7:0c:
出现上面的问题在edit >preference>ssh
指向一个 空文件 known_hosts就行了