In my country, we often have "Mentions" in court. Which are essentially status and other related hearings. With the judge making sure that everyone is prepared for the upcoming Prelim Hearing and Trial. That evidence (complete police brief) has been delivered to the defense team. That the defense team have done what steps they need and want to do.
In this case, it may even be because they have prepared their desired redactions of the AA and are having a hearing to determine what the judge will and will not allow? Perhaps this is necessary to see what will be allowed in the Preliminary Hearing?