Itisgoodpracticetobackupyourdatabeforeinstallinganynewversionofsoftware.AlthoughMySQLhasdoneitsbesttoensureahighlevelofquality,youshouldprotectyourdatabymakingabackup.MySQLgenerallyrecommendsthatyoudumpandreloadyourtablesfromanypreviousversiontoup