Illegal mix of collations

[Laci D]

I just updated from mysql80-server: 8.0.15_2 -> 8.0.16
When I want to start mysql-server I'm getting the following error:

2019-08-03T16:10:49.894743Z 0 [Warning] [MY-011068] [Server] The syntax 'expire-logs-days' is deprecated and will be removed in a future release. Please use binlog_expire_logs_seconds instead.
2019-08-03T16:10:49.894828Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2019-08-03T16:10:49.894900Z 0 [Warning] [MY-011068] [Server] The syntax 'expire-logs-days' is deprecated and will be removed in a future release. Please use binlog_expire_logs_seconds instead.
2019-08-03T16:10:49.894965Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2019-08-03T16:10:49.898954Z 0 [System] [MY-010116] [Server] /usr/local/libexec/mysqld (mysqld 8.0.16) starting as process 21434
2019-08-03T16:10:49.904508Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2019-08-03T16:10:49.904560Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_unicode_ci' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2019-08-03T16:10:58.750477Z 1 [System] [MY-011090] [Server] Data dictionary upgrading from version '80014' to '80016'.
2019-08-03T16:11:00.226044Z 1 [ERROR] [MY-013178] [Server] Execution of server-side SQL statement 'UPDATE mysql.index_partitions ip JOIN mysql.tablespaces ts ON ts.id = ip.tablespace_id JOIN mysql.table_partitions p ON p.id = ip.partition_id JOIN mysql.tables t ON t.id = p.table_id JOIN mysql.indexes i ON i.table_id = t.id SET ts.options=CONCAT(IFNULL(ts.options,''), IF(LOWER(GET_DD_PROPERTY_KEY_VALUE(t.options,'encrypt_type'))='y' , 'encryption=Y;','encryption=N;')) WHERE t.tablespace_id IS NULL AND i.tablespace_id IS NULL AND p.tablespace_id IS NULL AND ts.engine='InnoDB' AND GET_DD_PROPERTY_KEY_VALUE(t.options,'encrypt_type') IS NOT NULL AND GET_DD_PROPERTY_KEY_VALUE(ts.options,'encryption') IS NULL ' failed with error code = 1267, error message = 'Illegal mix of collations (utf8_general_ci,COERCIBLE) and (utf8_unicode_ci,COERCIBLE) for operation '=''.
2019-08-03T16:11:00.243061Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2019-08-03T16:11:00.245383Z 0 [ERROR] [MY-010119] [Server] Aborting

I don't really know where to start debugging this. I searched around but haven't found anything useful. Does anyone know what shall I do?