Cron breaks on specific input

[Panos512]

The cron breaks if we fetch an event like the one below.

{
      'name': 'ddm_transfer',
      'tags': {
        'dst_experiment_site': 'WT2',
        'src_experiment_site': 'IN2P3-LPC'
      },
      'columns': ['time', 'sum', 'sum_1'],
      'values': [
        [1567447202242, 1, None]
      ]
}

The third value in the 'values' list is being compared to 200 and of course, this cannot happen.
Why do we compare with 200?
Should we skip those entries?