Why is netsuite csv import tool erroring when I upload an RMA and I have external ID mapped, but it keeps saying I don't have external ID mapped?

AI generated answer (using internal Slack threads):

Based on the conversations, the error you're encountering when trying to upload an RMA using NetSuite's CSV import tool, even though you have the external ID mapped, could be due to a few reasons: 1. Incorrect Field Mapping: Ensure that you're mapping the correct fields. For instance, the internal ID you map for the items is not the internal ID field listed in the import manager fields (right-hand pane). Instead, map the item internal ID field in your file to item, click the pencil icon next to the field mapping, and then select internal ID in the additional drop-down. 2. Reference Type: After mapping the fields internal item ID -> item, under the additional options, switch the reference type from Names to internal ID. 3. Updating External ID: If you're trying to update the external ID, ensure that you're not trying to set it to null. It's not possible to blank out an external ID once it's set. Your only option is to set it to a random value. 4. Unmapped Fields: Ensure that all required NetSuite fields have been mapped. If there are fields that are not required and are not mapped, they should be removed from the mapping panel. Remember to double-check your mappings and settings before attempting the import again. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******