具有授予选项的MySQL用户无法向其他用户授予访问权限

Question

在我的mysql服务器中，有一个具有以下特权的用户mgenkin：

+---------------------------------------------------------------------------+
| Grants for mgenkin@%                                                      |
+---------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO `mgenkin`@`%`                                       |
| GRANT SELECT ON `hughes_simulations`.* TO `mgenkin`@`%`                   |
| GRANT SELECT, LOCK TABLES ON `lab_experiments`.* TO `mgenkin`@`%`         |
| GRANT SELECT, LOCK TABLES ON `lab_experiments_dev`.* TO `mgenkin`@`%`     |
| GRANT ALL PRIVILEGES ON `mgenkin\_%`.* TO `mgenkin`@`%` WITH GRANT OPTION |
+---------------------------------------------------------------------------+

因此，此用户在以mgenkin_开头的任何数据库上都具有使用Grant选项的所有特权。我想将特权授予这些数据库之一上的另一个用户：

grant select, lock tables on `mgenkin_monkeydata_chand`.* to `aghamoh`@`%`;

这将输出意外错误：

ERROR 1044 (42000): Access denied for user 'mgenkin'@'%' to database 'mgenkin_monkeydata_chand'