2309669 - Dump ASSERTION_FAILED when display a customer

There is dump ASSERTION_FAILED when you display a customer by T-code XD03. The keywords are as below:
  "ASSERTION_FAILED" " "
  "CVI_KA_BP_CUSTOMER============CP" or "CVI_KA_BP_CUSTOMER============CM00Z"
  "GET_ALL_CUST_CTS_FOR_PERSON"

The dump happens in the following coding:
   3   data:
   4     lv_person_guid like i_person_guid.
   5
>>>>   assert i_person_guid is not initial or i_person_id is not initial.
   7
   8   if i_person_guid is initial.
   9     lv_person_guid = get_partner_guid( i_person_id ).
  10   else.

• SAP ERP Central Component 6.0
• SAP ERP 6.0
• SAP Enhancement package for SAP ERP
• SAP Enhancement package for SAP ERP, version for SAP HANA
• Customer/BP integration
• Master Data Synchronization

The ASSERT condition was violated, CVI_CUST_LINK, KNVK, CVI_CUST_CT_LINK, xd01, vd01, vd02, vd03, fd01, fd02, fd03, r_customer_contacts, ZBPREL_RELATIONS_CORRECT, ZCUSTCONTACT_LINK_CHECK_REPORT , KBA , AP-MD-BP-SYN , Business Partner Synchronization , AP-MD-BP , Business Partner , Problem