Traceback (most recent call last):
  File "/app/src/slices_monitor_test_runner/test_runners/test_runner_base.py", line 170, in step
    yield
  File "/app/src/slices_monitor_test_runner/test_runners/test_runner_base.py", line 267, in step_with_retry
    target()
    ~~~~~~^^
  File "/app/src/slices_monitor_test_runner/test_runners/slices_singlenode_login.py", line 1409, in <lambda>
    lambda: self.test_ssh(
            ~~~~~~~~~~~~~^
        ssh_host,
        ^^^^^^^^^
    ...<7 lines>...
        proxy_openssh_pubkeys,
        ^^^^^^^^^^^^^^^^^^^^^^
    ),
    ^
  File "/app/src/slices_monitor_test_runner/test_runners/slices_singlenode_login.py", line 138, in test_ssh
    jump_proxy.connect(
    ~~~~~~~~~~~~~~~~~~^
        proxy_host,
        ^^^^^^^^^^^
    ...<6 lines>...
        timeout=2,
        ^^^^^^^^^^
    )
    ^
  File "/app/.venv/lib/python3.14/site-packages/paramiko/client.py", line 455, in connect
    server_key = t.get_remote_server_key()
  File "/app/.venv/lib/python3.14/site-packages/paramiko/transport.py", line 947, in get_remote_server_key
    raise SSHException("No existing session")
paramiko.ssh_exception.SSHException: No existing session