DD0073: Invalid Origin Type value

Hi Team,

I am using pinnacle 21 to validate a SEND define.xml v2.1, but got an Error below: 

DD0073: For Define-XML v2.0, the Origin Type attribute must have a value of 'CRF', 'Derived', 'Assigned', 'Protocol', 'eDT', or 'Predecessor' for SDTM and ADaM data and 'COLLECTED', 'DERIVED', 'OTHER', or 'NOT AVAILABLE' for SEND data. For Define-XML v2.1, the Origin Type attribute must have a value of 'Collected', 'Derived', 'Assigned', 'Protocol', or 'Predecessor' for SDTM and SEND data and 'Derived', 'Assigned', or 'Predecessor' for ADaM.

But in SEND IG V3.1.1, section 3.2.2.1 Origin Metadata, indicate the origin should be 'COLLECTED', 'DERIVED', 'OTHER', or 'NOT AVAILABLE' ,

In define.xml v2.0 it is match with IG rule, why define.xml v2.1 rule must using 'Collected', 'Derived', 'Assigned', 'Protocol', or 'Predecessor' for SEND? is there any concern on it？

Kind regards,

Qianqian