Alert history - auto-delete?

I am a ‘simple’ user, tracking individual flights every now and then.
I tracked 3 flights on Tuesday and wanted to track 3 more tomorrow, Friday.
I was surprised to get an error when setting up the third for tomorrow.
I figured out how to find and remove from my Alert history BUT I have to wonder whether it is possible to configure automatic Alert deletion after, say, a number of hours after flight arrival. Maybe the feature is already there but not configurable.