Correction is must brother !!!
Visit nearest excise office and ask for correction form.
Fill that form where the corrections are needed and submit to them with photo copies/proofs.
Within 24-36 hours it will be updated. Will cost under 1K
Long time back I had a vehicle who was mentioned as Cool Red in excise records. Whereas actually the vehicle was green.
I applied for correction and it was done.
At that time it cost me around 500 only. But having clean records is peace of mind.