After migration from phpbb something goes wrong with users count or statistics. Totally 398 users (migrated - 394 and then added 4 newbies). They are all valid. All caches rebuilded. Users count in sidebar statistics is 398. It is clear. User count in ACP is 1. Why? Last member is "Alexander 356". But in ACP and Home both shown "app64" (first member in fact). So what to do?