in last time's upgrade and today i got:
sudo mysql_upgrade -u root -p
Enter password:
Phase 1/7: 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.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.host                                         OK
mysql.index_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.user                                         OK
Phase 2/7: Installing used storage engines... Skipped
Phase 3/7: Fixing views
Phase 4/7: Running 'mysql_fix_privilege_tables'
ERROR 1813 (HY000) at line 77: Tablespace for table '`mysql`.`innodb_table_stats`' exists. Please DISCARD the tablespace before IMPORT
ERROR 1813 (HY000) at line 81: Tablespace for table '`mysql`.`innodb_index_stats`' exists. Please DISCARD the tablespace before IMPORT
ERROR 1813 (HY000) at line 85: Tablespace for table '`mysql`.`transaction_registry`' exists. Please DISCARD the tablespace before IMPORT
ERROR 1813 (HY000) at line 153: Tablespace for table '`mysql`.`gtid_slave_pos`' exists. Please DISCARD the tablespace before IMPORT
ERROR 1146 (42S02) at line 642: Table 'mysql.innodb_index_stats' doesn't exist
ERROR 1243 (HY000) at line 643: Unknown prepared statement handler (stmt) given to EXECUTE
ERROR 1146 (42S02) at line 645: Table 'mysql.innodb_table_stats' doesn't exist
ERROR 1243 (HY000) at line 646: Unknown prepared statement handler (stmt) given to EXECUTE
ERROR 1146 (42S02) at line 650: Table 'mysql.innodb_index_stats' doesn't exist
ERROR 1146 (42S02) at line 654: Table 'mysql.innodb_table_stats' doesn't exist
ERROR 1146 (42S02) at line 657: Table 'mysql.innodb_table_stats' doesn't exist
FATAL ERROR: Upgrade failed

what to do?