When redundancy is enabled, Event tasks must be deleted from the project and no tasks can be inhibited

When redundancy is enabled, Event tasks must be deleted from the project and no tasks can be inhibited.

You attempted to use an Event task or have inhibited a task in a system with redundancy enabled. In a redundant system, event tasks are not allowed, and no task can be inhibited.

Change the task to a non-event type or enable (uninhibit) the task, or do both.