Critical: error when mysql starting: An error occurred when initializing system tables

Critical: error when mysql starting: An error occurred when initializing system tables

Dear all
Hi
I am getting this error:
Column count of mysql.db is wrong. Expected 22, found 15. Created with MySQL 0, now running 50150. Please use mysql_upgrade to fix this error.
mysql.user has no `Event_priv` column at position 29
Event Scheduler: An error occurred when initializing system tables. Disabling the Event Scheduler.
the error file is attached.
Thanks

                  New to ADSelfService Plus?