How to update the email address of the Employee in R12

Hi Team,

We are recently acquired by new company and as process of it , all employees email address need to be changed to new email id.

I tried using the package 'HR_PERSON_API.update_person' by passing the person id, but it gives me below error,

"ORA-20001: FLEX-SSV EXCEPTION: N, MSG, validate_desccols() exception:

ORA-20005: DVLB.get_default_context() failed. SQLERRM: ORA-01403: no data found

ORA-06512: at "APPS.FND_FLEX_DESCVAL", line 1050

ORA-01403: no data found

ORA-06512: at "APPS.HR_PERSON_API", line 1100 "

I am unable to fix the error.

Can someone please help me in updating the email address.