last name missing on indian passport, holding 10 yr B1/B2 visa

[Javs52]

when my indian passport was made 30 years ago, my surname section was blank and has been like that forever.

the main concern is i have already a B1/B2 visa of 10 year validity issued to me but my father name is mentioned as last name???

now i am having a fresh passport corrected and issued to insert the last name, will there be any trouble when i enter US, are they searching my records by last name?

will this affect my existing B1/B2 visa? or I should re-apply?

thanks for any suggestions and advice