The single purpose of room1archive event is randomize access level after game start, and then this event will do nothing (wasting some cpu time each frame). Such events should delete itself after they're done like buttghost or endroom106 events, however this event might be deleted from game entirely - you can assign access level in fillRoom method
UpdateEvents.bb
https://github.com/SCP-CB-Community-Preservation-Project/scpcb/blob/main/UpdateEvents.bb#L8691
MapSystem.bb
https://github.com/SCP-CB-Community-Preservation-Project/scpcb/blob/main/MapSystem.bb#L4632