Based on documentation (https://www.zabbix.com/documentation/6.0/en/manual/config/notifications/action/conditions) using "And" calculation is disallowed between several triggers when they are selected as a Trigger= condition.

 

Steps to reproduce:

1. Navigate to Configuration->Actions->Trigger actions (6.0, 6.2) | Alerts -> Actions ->Trigger actions (master).
2. Create new action.
3. Add 2 conditions:
   1. Trigger equals ... (add any trigger)
   2. Trigger equals ... (add any trigger)
4. Set Type of calculation to "And".
5. Add any operation.
6. Add action.
7. Observe that action is created.

Result:
Action is created with multiple "Trigger equals" conditions.

Expected:

Action is not created and error message is showed: