I made a trigger, but it does not work, how to fix it?

Question

MySQL

I made this kind of trigger:

CREATE TRIGGER bonus
AFTER INSERT ON `personal` FOR EACH ROW
UPDATE personal SET cash = 10000 + NEW.cash;

The idea is that when I add a new employee to the personal table, and put down the salary in cash, a bonus of 10000 is added to him.
The trigger was created, but when adding a new employee to the table, an error occurs

Operation failed: There was an error while applying the SQL script to the database.
ERROR 1442: 1442: Can't update table 'personal' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.

Answer 1

CREATE TRIGGER bonus
BEFORE INSERT ON `personal` FOR EACH ROW
SET NEW.cash = 10000 + NEW.cash;