[Qa-jenkins-scm] Build failed in Jenkins: reproducible_setup_pbuilder_unstable_armhf_ff4a #971

[jenkins at jenkins.debian.net]

See <https://jenkins.debian.net/job/reproducible_setup_pbuilder_unstable_armhf_ff4a/971/display/redirect>

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[EnvInject] - Loading node environment variables.
Building remotely on ff4a-armhf-rb.debian.net (ff4a armhf) in workspace <https://jenkins.debian.net/job/reproducible_setup_pbuilder_unstable_armhf_ff4a/ws/>
[reproducible_setup_pbuilder_unstable_armhf_ff4a] $ /bin/sh -xe /tmp/jenkins2281481644618388963.sh
+ /srv/jenkins/bin/jenkins_master_wrapper.sh
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:IpOeA378iY1R3z+tBaKQDYB/9oVZgjeweHOIXlpIblk.
Please contact your system administrator.
Add correct host key in /var/lib/jenkins/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /var/lib/jenkins/.ssh/known_hosts:46
  remove with:
  ssh-keygen -f "/var/lib/jenkins/.ssh/known_hosts" -R [ff4a-armhf-rb.debian.net]:2241
ECDSA host key for [ff4a-armhf-rb.debian.net]:2241 has changed and you have requested strict checking.
Host key verification failed.
Tue  8 Jan 10:53:30 UTC 2019 - ff4a-armhf-rb.debian.net seems to be down, sleeping 1min before exiting with error.
Build step 'Execute shell' marked build as failure