KeyError in lpy plot followup

https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/events/1257/609412/log :

2019-11-12 08:10:44,016 [analyze.analyze_event] executing followup: find_lpy(1257609412)
2019-11-12 08:10:44,018 [analyze.analyze_event] exception in find_lpy:
Traceback (most recent call last):
  File "/home/lockloss/opt/lib/python2.7/site-packages/locklost-0.16.7-py2.7.egg/locklost/analyze.py", line 53, in analyze_event
    func(event)
  File "/home/lockloss/opt/lib/python2.7/site-packages/locklost-0.16.7-py2.7.egg/locklost/plugins/lpy.py", line 39, in find_lpy
    channels = [get_sus_channel(base_channel, corner) for corner in lpy_map['corners']]
KeyError: 'corners'