What does the CROSSSLOT Keys in request don't hash to the same

Redis集群报错： CROSSSLOT Keys in request don't hash to redis exceptions responseerror_ crossslot keys in request don't hash to the same slot ERR CROSSSLOT Keys in request don't hash to the same slot within 'MULTI' > EXPIRE user wizardz world slot 哈希槽是来自Redis Cluster的概念, 但在各种集群方案都有使用。 哈希槽是一个key的集合，Redis集群共有16384个哈希槽，每个key通过CRC16散列

the finer reels of life slot ERR CROSSSLOT Keys in request don't hash to the same slot within 'MULTI' > EXPIRE user