Duplicae records in Master data

Hi all

We have an infosource 0FI_AR_3 that loads to an infoobject 0BILL_NUM and to an ODS 0FI_AR_O03. Yesterday, the load to the ODS was fine but the load to the InfoObject 0BILL_NUM has failed giving me the following error;

"128 duplicate record found. 4115 recordings used in table /BI0/XBILL_NUM"

"128 duplicate record found. 4115 recordings used in table /BI0/PBILL_NUM"

Is there a way I could fix this error. Could some one help me please.

Regards,

S.P