Let me put it into different instances.
I1 I book a ticket for two passengers today. The message which I receive from IR is
Pax1 7 SL
Pax2 8 SU
I2 Tomorrow I partially...
more... cancel the reservation of Pax1.
I3 With this, if the status of Pax2 becomes
Pax2 7 SL
Won't this contradict with the message that I received in I2?