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Starting the server would replace the non encrypted values in tenant_server_connections table and also set the tenant_key in the tenants table
Note : Encryption utilizes the values of the "identifier" and "name" columns in "tenants" table. If the values in these two columns are changed, then the MySQL server details need to be encrypted by freshly entering the connection details in "server_connection_details_for_encryption" and setting "is_server_connection_details_encrypted" column in "tenant_server_connections" to 0.