MySQL 5.6.51 is the last release of the MySQL 5.6 series. Oracle will no longer provide updates or security fixes for this version. Following Perconas Release Lifecycle policies, the Percona Server for MySQL 5.6 series has reached End of Life (EOL) as well, and we will no longer provide public builds for bugs and security [&]

https://www.percona.com/blog/2021/02/16/mysql-5-6-and-percona-server-for-mysql-5-6-are-end-of-life/