What is the appropriate mapping for subinventory Code in the EDI 850 POI Inbound transaction?

Hi,

Oracle Application Version:12.2.7

Concurrent Program Name:     IN: Purchase Order (850/ORDERS)  

We need to import subinventory code to sales order lines via the POI850 file.

We tried with record 1900 and 7000 but failed to import the subinventory code to sales order lines.

Note: The above-mentioned record numbers are related with  Reservations (Header)  - interface table - OE_RESERVTNS_INTERFACE

We are getting the following error:

Start inbound transaction for POI.

Staging for transaction POI.

The record number at line 13 is invalid for this transaction.

The record number at line 20 is invalid for this transaction.

End of staging for transaction POI.

Starting generic inbound for transaction POI.