cannot convert float NaN to integer

[lssb]

I met lots of errors like following and the result file was 0 byte.

/home/ionadmin/miniconda3/envs/circle-map/lib/python3.7/site-packages/circlemap/utils.py:728: UserWarning: WARNING: Could not compute the probability for the mate interval priors [['chr6', 151887040, 151887190, 'DR', 'R', '0.999999'], ['chr6', 151887040, 151887190, 'DR', 'R', '0.999999']] due to the following error cannot convert float NaN to integer
 Skipping intervals
  str(bed_prior), str(e)))

and the environment was created by conda.

Could you help me?