[2017-11-25 09:58:28 CET] ERROR: [alignak.scheduler] The instance backend_scheduler raise an exception 'schema_version'.I disable it and set it to restart it later
[2017-11-25 09:58:28 CET] ERROR: [alignak.scheduler] Exception trace follows: Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/alignak/scheduler.py", line 664, in hook_point
fun(self)
File "/usr/local/lib/python2.7/site-packages/alignak_module_backend-1.0.1-py2.7.egg/alignak_module_backend/scheduler/module.py", line 180, in hook_load_retention
del host[key]
KeyError: 'schema_version'
Retention exception !