no longer registers heartbeats

Hi,

Suddenly found out that my flukso had not sent any data since April.
Rebooted the device which did not help.
Logged in and ran:

  1. root@flukso:/# /usr/share/lua/flukso/heartbeat.lua 0
  2. (table)
  3.   [device] = (string) 8a2690413e9b0920356fd07f6f117de8
  4.   [timestamp] = (number) 196
  5.   [signature] = (string) a6b411b055e50f91d770fe8ac8fb67a6276e32d2
  6. (table)
  7.   [memtotal] = (number) 13764
  8.   [memcached] = (number) 4432
  9.   [version] = (number) 101
  10.   [uart_oe] = (number) 0
  11.   [membuffers] = (number) 1368
  12.   [memfree] = (number) 1592
  13.   [uptime] = (number) 196
  14.   [reset] = (number) 0
  15. (string) Authentication failed.

What is that Authentication failed? Is something wrong with the device?