XCDR uuids_dont_match error

Hello ,
I am setting up the Couchbase cluster on GCP .My Couchbase version is Community Edition 5.1.1 build 5723.

i have two machine. i create remote cluster from first machine , add replications this machine and start replicating but give error.

:TopoChangeDet:unexpected status code, 404, in _pre_replicate response. respMap=map[reason:uuids_dont_match error:not_found]

can you help me?