SerialNumberTrackingType

Determines at which point in the goods flow serial numbers are captured for an item. Replaces the lossy three-value SerialNumberType on the deprecated storageConstraints block, which could not express tracking on every warehouse movement and reported such items as SerialNumbersTracking. The item list on GET /v2/items reports the same four states as serialNumberTrackingMode of type SerialNumberTrackingMode; the numeric values agree one to one, only the value names of that older enum differ (None, Outgoing, OutgoingIncoming, All). Switching away from ‘None’ turns the item into a serial number item, which its current state can refuse: it must have no stock and no goods receipts, and must not use batches, shelf life expiration dates or divisible stock. Such a refusal is reported as HTTP 409 with the blocking reason, not as HTTP 400.