Historical Record Flag business event type

[DebbieCloud]

Hi

I am trying to remove the Historical Record flag on one of our Business Event Types.

I use transaction re_rhgrenz4.

I enter the "New End Date" of 9999/12/31 and also the "Existing End Date".

I remove the historical record tick in the white tick box, as well at the tick in the Test box.

The end date is then changed, but the "Historical flag" icon still stay on the Business Event Type. And also when I want to change something after this on the event type, it says:

Object archived (can only be displayed). How do I get rid of this "Historical flag" icon?