question about connection abandoned bzr

[Lenjoy]

Dear bazaar users,

when I push a project:

> bzr push bzr+ssh://mars@bazaar.launchpad.net/~mars
/+junk/myproject
The server's host key is not cached in the registry. You
have no guarantee that the server is the computer you
think it is.
The server's rsa2 key fingerprint is:
ssh-rsa 1024 9d:38:3a:63:b1:d5:6f:c4:44:67:53:49:2e:ee:fc:89
Connection abandoned.
bzr: ERROR: Connection closed: please check connectivity and permissions
(and tr
y -Dhpss if further diagnosis is required)

when I branch a project:

> bzr branch lp:txprotobuf -Dhpss
The server's host key is not cached in the registry. You
have no guarantee that the server is the computer you
think it is.
The server's rsa2 key fingerprint is:
ssh-rsa 1024 9d:38:3a:63:b1:d5:6f:c4:44:67:53:49:2e:ee:fc:89
Connection abandoned.
bzr: ERROR: Connection closed: please check connectivity and permissions
(and tr
y -Dhpss if further diagnosis is required)
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