问无法将mysql的字符集从utf8mb4更新为utf8

EN

SET character_set_client = 'utf8';
SET character_set_connection = 'utf8';
SET character_set_database = 'latin1';
SET character_set_filesystem = 'binary';
SET character_set_results = 'utf8';
SET character_set_server = 'latin1';
SET character_set_system = 'utf8';

set collation_connection = 'utf8_general_ci';
set collation_database = 'latin1_swedish_ci';
set collation_database = 'latin1_swedish_ci'

commit;

ALTER DATABASE sanskvrcpu_db2 CHARACTER SET utf8 COLLATE utf8_general_ci;

mysql> ALTER DATABASE sanskvrcpu_db2 CHARACTER SET utf8 COLLATE utf8_general_ci;
Query OK, 1 row affected, 2 warnings (0.00 sec)

Warning (Code 3719): '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.
Warning (Code 3778): 'utf8_general_ci' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.