1. Check the error log for the MySQL 137 error:

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

2. Check the MySQL configuration file for any misconfigurations:

$ cat /etc/mysql/my.cnf

3. Check the MySQL process list for any suspicious activity:

$ mysqladmin -u root -p processlist

4. Check the MySQL user privileges for any incorrect permissions:

$ mysql -u root -p -e "SELECT User, Host, Password FROM mysql.user;"

5. Check the MySQL database tables for any corrupt data:

$ mysqlcheck -u root -p --all-databases

6. Check the MySQL database logs for any suspicious queries:

$ mysqlbinlog /var/log/mysql/mysql-bin.log

7. Use an automated database observability tool to monitor and fix the MySQL 137 in question. Automated database observability tools can provide real-time visibility into the performance and health of your database, allowing you to quickly identify and fix any issues that may arise. Additionally, these tools can provide detailed insights into query performance, allowing you to optimize your database for maximum efficiency.