Concurrent order processing

[PiotrN]

Hi,

I'd like to know if current KonaKart core and/or admin GUI is protected from concurrent changes made by two admin-users? Let's say that U1 and U2 are two users with granted privilege to modify order's (O) current status (S1). Here's the exemplary timeline:

U1: opens order O,
U1: views the order O and sees that O in status S1 needs to be updated (but doesn't update it yet),
U2: opens order O,
U2: changes order O status to S2,
U1: changes order O status to S3.

O is in state S3 which is not the result expected by the user U2.

How can I be secured from such situations when we have more than one person who is processing the orders?

Thanks in advance.

Regards.