Just with any kind of consensus (reaching terms accepted by all of the parties), it is just not always possible, especially in large communities. I had experience in a community of LARP rules designers, with around 3-4 people active at the same time at most, and sometimes we still failed too agree on some point. In a community of 10 users reaching consensus is just impossible most of the time, there will always be someone who is not satisfied fully.
After some time of discussion that is either specified, or after big enough amount of members asking for it, if consensus was not found in a free discussion, a voting took place. In our small LARP designers community we typically had to choose one of the two options, so it was not hard. Sometimes we asked members that were not active at the moment, as they were more interested in other parts of the rules, but it was mostly enough to just appoint one arbiter. In a community of 10 people where everyone has equal rights, you can just have something like SE Meta voting.
Consensus is good if you reach it, but again, most of the time it's simply not possible. And if you had to resort to voting again, you just have to say to the unsatisfied users that it's said, but not everyone's preferences can actually be applied.