This record in table HZ_PARTIES cannot be locked as it has been updated by another user error in IBY

We are getting the following error messge 'This record in table HZ_PARTIES cannot be locked as it has been updated by another user.'

in the package while using below the API  IBY_EXT_BANKACCT_PUB.UPDATE_EXT_BANK_BRANCH

Our application is recently upgraded to R12 after that its not working.

Please help me

P_EXT_BANK_BRANCH_REC.BCH_OBJECT_VERSION_NUMBER := 1.0;
P_EXT_BANK_BRANCH_REC.TYP_OBJECT_VERSION_NUMBER := 1.0; --?
P_EXT_BANK_BRANCH_REC.BRANCH_NAME := EMP_BANK_CUR.BANK_BRANCH_NAME;
P_EXT_BANK_BRANCH_REC.BRANCH_TYPE := 'OTHER'; --?
P_EXT_BANK_BRANCH_REC.BANK_PARTY_ID := V_BANK_ID;