To change place of birth in the passport as per the birth certicate

The applicant who is handicaped and cannot speak , came to india in 1990.along with her mother a US citizen and the applicant having a green card with a zambian . passport. They both joined the Aurobindo ashram in 1990 at Pondicherry expecting for a relief for her daughter. in 2006 the applicant sent her zambian passport to the zambian embassy in New Delhi for renewal. Delhi office confirmed they have sent her passport to Zambia for renewal. but she never received the passport. back renewed. In 2010, since they wanted to go to US applied for an Indian passport. the passport was issued with place of birth as Orgam Gujarat,which was her father's place of birth and father expired in 1989. In 2012 the applicant applied for immigration to US , her mother as petitioner and her younger brother is in US. The applicant is 62 yearss old now and her mother is 90 years. Since now they are alone in an apartment wanted to go back to US. The immigration interview was in July 27th 2021 and they requested her to change the place of birth as Zambia as per her original birth certificate. The Indian passport need to be corrected the place of birth to Zambia. Kindly advise what should be done The applicant is in Pondicherry.