When using SecureCRT to log in to the server, I initially entered the wrong account (an account on another server, this server does not have this account at all), got an error, and then when I asked for the correct account, SecureCRT reported an error
The server has disconnected with an error. Server message reads:
A protocol error occurred. Change of username or service not allowed: (pma_etl,ssh-connection) -> (etl,ssh-connection)
Obviously, this error report says that I am not allowed to modify the account. I used the pma_etl account to log in before. Even if there is no error, it was recorded by SecureCRT. I tried to switch to the correct etl account but an error occurred. Baidu, this is because in SecureCRT problem with settings
Just set it to your correct account here.