为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
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【DM 版本】：dm-ansible-v1.0.2
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【问题描述】：
» check-task /home/tidb/dm-ansible-v1.0.2/conf/task_basic_worker4.yaml.bak
{
“result”: false,
“msg”: “[code=38028:class=dm-master:scope=internal:level=high] mysql-replica-04 relevant worker not found\ngithub.com/pingcap/dm/pkg/terror.(*Error).Generatef\
\t/home/jenkins/agent/workspace/build_dm_master/go/src/github.com/pingcap/dm/pkg/terror/terror.go:237\ngithub.com/pingcap/dm/dm/master.(*Server).generateSubTask\
\t/home/jenkins/agent/workspace/build_dm_master/go/src/github.com/pingcap/dm/dm/master/server.go:1861\ngithub.com/pingcap/dm/dm/master.(*Server).CheckTask\
\t/home/jenkins/agent/workspace/build_dm_master/go/src/github.com/pingcap/dm/dm/master/server.go:1835\ngithub.com/pingcap/dm/dm/pb._Master_CheckTask_Handler\
\t/home/jenkins/agent/workspace/build_dm_master/go/src/github.com/pingcap/dm/dm/pb/dmmaster.pb.go:2643\
google.golang.org/grpc.(*Server).processUnaryRPC\
\t/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:995\ngoogle.golang.org/grpc.(*Server).handleStream\
\t/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:1275\ngoogle.golang.org/grpc.(*Server).serveStreams.func1.1\
\t/go/pkg/mod/google.golang.org/grpc@v1.23.0/server.go:710\
runtime.goexit\
\t/usr/local/go/src/runtime/asm_amd64.s:1337”