Editing The Attendees Of Events

With the Screen Event we control the invitations to our web seminars. Once I send the invitation from the screen event (CR306030), the record is locked in the grid for editing (checkbox optional or the comment field). It is only possible to delete it. This is inconvenient if you want to note in the comment after the invitation that the participant will attend later, or maybe did not show up.

I tried a few settings in the project editor, but I could not do the editing once the invitation status changed.

Can someone help me?

Thanks!