CWP & Mysql 5.7 bug

Thank you for your hard work to update the software, however how come you drop support MySQL server and suddenly replace by MariaDB, this is lead to bunch of issues due to all my databases are on Mysql version 5.7
I must remove MariaDB and manually install Mysql SQL 5.7 (MariaDB does not support JSON column data type which is exist in my current databases) , then I got this error is CWP

Please have a look on this screenshot :
http://prnt.sc/eolgxk

I'm trying to convert my database to follow up your update due to MariaDB is default Mysql engine ! Hope this help you to spot the issue of CWP. Thanks