1. Check the error log for the MySQL 174 instance to identify the root cause of the issue.

$ sudo tail -f /var/log/mysql/error.log

2. Once the root cause of the issue is identified, take the necessary steps to fix it. For example, if the issue is related to a missing table, create the table using the following command:

$ CREATE TABLE table_name (
 column1 datatype, 
 column2 datatype, 
 column3 datatype, 
 ....
);

3. Restart the MySQL 174 instance to apply the changes.

$ sudo service mysql restart

4. Check the error log again to make sure the issue has been resolved.

$ sudo tail -f /var/log/mysql/error.log

5. To ensure that similar issues do not occur in the future, it is recommended to use an automated database observability tool. This tool can assist in monitoring and fixing the MySQL 174 instance by providing real-time insights into the performance and health of the database. It can also detect and alert on any potential issues before they become critical.