[QUESTION]What the command cluster flushslots really mean will it notice all node in the cluster?

[Cloud-Zhang]

I create one cluster with 3 maters and 3 replicas , and we do the rdb file backup and want to restore accoding the back up file, ps:when we do the backup we get the mater slots . so the data should like 0-5461.rdb. And the case is we want to restore the data to their original node. So i want to remove all the slots which belong to the node and use the backup info slots to provide this node slots. After i check the API there is one command called the CLUSTER FLUSHSLOTS. But when i try this command it only work in the current node. even i remove the slots in the current node but in other node when i execute the CLUSTER NODES it still show this node have the slots. So the question is why remove the slots in one node and other node can't know ? Base on my understanding once we change something and all cluster should effected and do the change . But now seems no. So could you help to explain to me why it works like this . I think it should notice to other node that i already remove the slots . and other node update the config .
Looking forward to your reply!!!
Thanks