MySQL8修改密码报错ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

MySQL8 修改密码报错：ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

show variables like 'validate_password%';

mysql> show variables like 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password.check_user_name    | ON     |
| validate_password.dictionary_file    |        |
| validate_password.length             | 8      |
| validate_password.mixed_case_count   | 1      |
| validate_password.number_count       | 1      |
| validate_password.policy             | MEDIUM |
| validate_password.special_char_count | 1      |
+--------------------------------------+--------+
7 rows in set (0.00 sec)

set global validate_password_policy=LOW;

set global validate_password.length=6;