During October, we will be performing a major upgrade to MySql 8.0, from the current MySql 5.6. We are making this change in order to keep up to date with the latest features, fixes and patches for MySql, after giving 8.0 some time to become as reliable as possible. There may however be some issues for very old scripts running on our servers, so there are actions that we are strongly recommend all customers who are using MySql on our servers take. Rather than detail these steps here, we have put together a knowledge base article on our website with our recommended steps to ensure that your website is compatible with the new version:
https://support.liquidsix.com/index.php?/Knowledgebase/Article/View/111/5/the-october-2019-upgrade-to-mysql-8

This change will take place on the 26th October in a window starting at 00:30 UK time (GMT+1) and ending at 06:30.