DataError: invalid regular expression: invalid escape \ sequence

[sentry]

Sentry Issue: ONADATA-SY

InvalidRegularExpression: invalid regular expression: invalid escape \ sequence

  File "django/db/backends/utils.py", line 105, in _execute
    return self.cursor.execute(sql, params)

DataError: invalid regular expression: invalid escape \ sequence

(12 additional frame(s) were not displayed)
...
  File "onadata/apps/api/viewsets/data_viewset.py", line 658, in list
    return self._get_data(
  File "onadata/apps/api/viewsets/data_viewset.py", line 910, in _get_data
    self._set_pagination_headers(
  File "onadata/apps/api/viewsets/data_viewset.py", line 495, in _set_pagination_headers
    num_of_records = query_count(
  File "onadata/apps/viewer/models/parsed_instance.py", line 382, in query_count
    cursor.execute(sql, params)

[linear]

ONADATA-1180