CSV Import > Customer > Set External ID to Null
I realized there is was another discussion about this from 2017-19 that resolves the issue using SuiteScripting. However, the help files related to External IDs (https://netsuite.custhelp.com/app/answers/detail/a_id/10820/kw/external%20id%20overview) suggest that "External IDs can be through CSV import or web services."
I am curious how this is done. I am able to CHANGE the value of an External ID using a CSV Update import, but I cannot clear its value. Selecting the "Set Value to Null" option in field mapping generates an error when proceeding to the Run screen (screenshot attached).