Data Load Error - 'Ambiguous values found for non-root attributes'

Hi,

We are trying to load Product master data through HCI into IBP 4.0 FP1. Few records keep getting rejected with the following details:

REJECTION_CODE_NAME --> No unique master data found

REJECTION_DESCRIPTION --> Ambiguous values found for non-root attributes S2PRDGROUP

Has anyone encountered this error before?

We're not able to find anything obvious.

Thanks,

Chendur