Why can't some Redis instances use the KEYS command?

to the same slot - Multi - redis crossslot keys in request don't hash to the same slot When multi-key commands are executed in a GeminiDB Redis instance, the error CROSSSLOT Keys in request don't hash to the same slot may be redis slot CROSSSLOT Keys in request don't hash to the same slot 可能原因：Redis集群架构直连模式不支持跨Slot执行涉及多Key的命令，例如DEL、MSET、MGET等。

redis hash slot At the same time Redis throwing below warning Redis connection problem {:exception=>Redis::CommandError: CROSSSLOT Keys in request don't