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# OrderItem.external_id property
ID of the order in another system. For example, the Amazon Order ID if this is an Amazon order. This field can be updated in a /POST, but using a /PUT to update the order will return a 400 error. The field 'external_id' cannot be written to. Please remove it from your request before trying again. It can not be overwritten once set.
Signature:
external_id?: any | null;