ERROR 5460 --- [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.TransientDataAccessResourceException: ### Error updating database. Cause: java.sql.SQLException: Could not retrieve transaction read-only status from server### The error may involve cz.java.mapper.AdminMapper.addAdminNav-Inline### The error occurred while setting parameters### SQL: INSERT INTO admin_nav(`text`,state,iconCls,pid,href) VALUES(?,?,?,?,?)### Cause: java.sql.SQLException: Could not retrieve transaction read-only status from server; SQL []; Could not retrieve transaction read-only status from server; nested exception is java.sql.SQLException: Could not retrieve transaction read-only status from server] with root causejava.sql.SQLException: Unknown system variable 'tx_read_only'