although it's not clearly written in PSE, recalculation of an event frame generation analysis will ONLY delete the event frames created by this analysis. Event frames created manually in PSE or via an AF-SDK application are NOT deleted. Depending of the use case this can result in wrong information for the end users. Solving this by a manual deletion is very time consuming and quite impossible in case you have a lot of elements to handle. Please allow us to select (in PSE and AF-SDK) that all event frames must be deleted
