I sent a PM asking for the series to be unlocked.
I'm a little new here, but is there a reason why series are locked?
PMs will usually go unanswered as it's hard for us to keep track of them, and we like to have a public record of changes being made. The most common reason for a series to be locked is that there was a discussion/disagreement about how to handle that particular series and a final determination had been made and it's locked to prevent further changes by users who don't agree. Other times, it's because a series needs to be fixed, and to prevent more fixing someone will lock it until they do fix it. It appears this was locked to prevent people coming around and changing it after being fixed in accordance with our policies.