merger resolving: KeyError 'newIds'

[ilastikdev]

ERROR 2017-03-20 14:25:51,179 log_exception 31444 140602277164800 Traceback (most recent call last):
  File "/home/jales/software/miniconda/envs/ilastik-devel/ilastik-meta/ilastik/ilastik/applets/dataExport/dataExportGui.py", line 386, in exportSlots
    self.parentApplet.prepare_lane_for_export(lane_index)
  File "/home/jales/software/miniconda/envs/ilastik-devel/ilastik-meta/ilastik/ilastik/workflows/tracking/structured/structuredTrackingWorkflow.py", line 372, in prepare_lane_for_export
    withBatchProcessing = True
  File "/home/jales/software/miniconda/envs/ilastik-devel/ilastik-meta/ilastik/ilastik/applets/tracking/conservation/opConservationTracking.py", line 452, in track
    resolvedMergersDict = self._resolveMergers(hypothesesGraph, model)
  File "/home/jales/software/miniconda/envs/ilastik-devel/ilastik-meta/ilastik/ilastik/applets/tracking/conservation/opConservationTracking.py", line 324, in _resolveMergers
    resolvedMergersDict = mergerResolver.run()
  File "/home/jales/devel/src/hytra/hytra/core/ilastikmergerresolver.py", line 100, in run
    mergerLinkFilter)
  File "/home/jales/devel/src/hytra/hytra/core/mergerresolver.py", line 286, in _refineModel
    newIds = self.unresolvedGraph.node[node]['newIds']
KeyError: u'newIds'