error

2019-07-19 16:33:29.637 22531-22557/com.mydomain.myapp E/ERROR: SFTP upload filed
    com.jcraft.jsch.JSchException: UnknownHostKey: 172.27.0.77. RSA key fingerprint is a4:8f:7e:39:a8:1f:db:ae:e7:ae:1d:b4:78:33:2e:21
        at com.jcraft.jsch.Session.checkHost(Session.java:805)
        at com.jcraft.jsch.Session.connect(Session.java:345)
        at com.jcraft.jsch.Session.connect(Session.java:183)
        at com.mydomain.myapp.SftpClass.doInBackground(SftpClass.java:18)
        at com.mydomain.myapp.SftpClass.doInBackground(SftpClass.java:9)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)