CREDIT NOTE IMPORT requiring credit note number?

SOLVED

Is there a way to import an OE credit note without specifying the CRDNUMBER? I'd like the system to assign the next available number so I'm not duplicating and causing an issue with a manually entered one. When trying to import I'm getting an error: "Credit Note number cannot be blank."
My import file has data in the following fields only:
OECRDH.CRDUNIQ
OECRDH.CUSTOMER
OECRDH.PONUMBER
OECRDH.REFERENCE
OECRDH.RETDATE
OECRDH.CRDDATE
OECRDH.POSTDATE
OECRDD.CRDUNIQ
OECRDD.LINENUM
OECRDD.LINETYPE
OECRDD.ITEM
OECRDD.LOCATION
OECRDD.QTYRETURN
OECRDD.UNITPRICE
OECRDD.PRICEOVER
OECRDD.RETURNTYPE

What am I missing? Is this possible?