Error when editing vote when "max number of participants per option" is enabled, and a choice reached the maximum.
Option "max number of participants per option" set to 1 (don't know whether that's necessary)
Option "every selection can be changed by everyone" set (don't know whether that's necessary)
Choose an option A as person1
Choose another option B as person2
Try to choose yet another option C as person1
Error: conflict!
Test case:
Edited by ixeft