duplicated flight numbers

[airlinemanage]

suppose I have two routes: A-B-A-B-A-C and C-A-B-A-B-A, each route takes one day to fly. Assigning both routes to an aircraft for each day allows it to switch between the two routes when a new day comes. 

Now, I have another aircraft also flying these two routes, so that when an aircraft flies a route, another aircraft flies the other. BUT, the game doesn't allow the flight numbers of same flights handled by different aircraft to be the same, any solution for this problem?

[Unknown98]

I'm planning to address it in a future update, where the game will check origin & destination & departure time, and if all of them match, it will allow you to duplicate the flight numbers.

[airlinemanage]

ok, so I'll add a negative sign in front of duplicated flight numbers in this version of the game. Probably this is already the best way to solve the problem.