[mysqld] 

character-set-server=utf8 

collation-server=utf8_unicode_ci

# mysql_upgrade --force

Phase 1/8: Checking and upgrading mysql database

Processing databases

mysql

mysql.column_stats                                 OK

mysql.columns_priv                                 OK

mysql.db                                           OK

mysql.event                                        OK

mysql.func                                         OK

mysql.global_priv                                  OK

mysql.gtid_slave_pos                               OK

mysql.help_category                                OK

mysql.help_keyword                                 OK

mysql.help_relation                                OK

mysql.help_topic                                   OK

mysql.index_stats                                  OK

mysql.innodb_index_stats                           OK

mysql.innodb_table_stats                           OK

mysql.plugin                                       OK

mysql.proc                                         OK

mysql.procs_priv                                   OK

mysql.proxies_priv                                 OK

mysql.roles_mapping                                OK

mysql.servers                                      OK

mysql.table_stats                                  OK

mysql.tables_priv                                  OK

mysql.time_zone                                    OK

mysql.time_zone_leap_second                        OK

mysql.time_zone_name                               OK

mysql.time_zone_transition                         OK

mysql.time_zone_transition_type                    OK

mysql.transaction_registry                         OK

Phase 2/8: Installing used storage engines... Skipped

Phase 3/8: Running 'mysql_fix_privilege_tables'

ERROR 1267 (HY000) at line 3127: Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (utf8mb3_unicode_ci,IMPLICIT) for operation '='

ERROR 1267 (HY000) at line 3176: Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (utf8mb3_unicode_ci,IMPLICIT) for operation '='

FATAL ERROR: Upgrade failed