How can i prevent multiple same task from task scheduler in windows

Suppose I have two same task with different time based trigger, in some scenario trigger is same for both task but i want to execute one task in that scenario. For example i have two same task, one task i want to run on every half month and another task i also want run on every 3 days in a month.But in some scenario condition will same for both task, at that time i want to run only one task.

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