Hz_Cust_Account_Site_V2pub.update_cust_site_use - Error updating Primary SalesRep ID

I get the following error when I use  the same object version number that is for the site_use_id:

API Message: 1.The following SQL error occurred: 

ORA-01403: no data found.

When I use object version number + 1 for the site_use_id, I get the error:

API Message: 1.The following SQL error occurred: 

ORA-01403: no data found.

I am on R12.1.3. Running this as a concurrent program.

Code is given below:

============

PROCEDURE update_salesrep(P_RETCODE    OUT NUMBER,

                       P_ERRBUFF    OUT VARCHAR2

                      ) AS

  

p_order_header_rec      OE_Order_PUB.Header_Val_Rec_Type;

v_cust_site_use_rec     Hz_Cust_Account_Site_V2pub.CUST_SITE_USE_REC_TYPE;