ValueError: invalid literal for int() with base 10: 'default'

[jarofgreen]

Describe the bug

Python Crash.

  File "/home/iatidatastoreclassic/iatidatastoreclassic/iati_datastore/iatilib/frontend/serialize/csv.py", line 202, in description
    return select_description_type(activity.description_all_values['default'], desc_type_name)
  File "/home/iatidatastoreclassic/iatidatastoreclassic/iati_datastore/iatilib/frontend/serialize/csv.py", line 189, in select_description_type
    return description_most_general(all_values)
  File "/home/iatidatastoreclassic/iatidatastoreclassic/iati_datastore/iatilib/frontend/serialize/csv.py", line 179, in description_most_general
    elif int(desc_type) < int(out):
ValueError: invalid literal for int() with base 10: 'default'

To Reproduce

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