It seems so, unless I'm misunderstanding the documents. From an old, random readme for a workshop, then the official wiki:

    - https://github.com/mjordan/archivematicaworkshop#archivematica-and-aip-migration
    - https://wiki.archivematica.org/AIP_re-ingest

Perhaps someone with better knowledge than I could tell whether this implies that each version gets its own PID (crucial for publications etc).