Is there any harm to taking Hepatitis B vaccines again?

[calafair]

I'm currently taking a course in Healthcare and will have placements in hospitals and clinics. I've tested with positive surface antibody of 483IU /L.

The nurse and doctor at the clinic where I take my vaccines says I have enough serology and do not need anymore vaccinations. But my placement officer says she needs proof of the dates I got vaccinated - records which I don't have.

Without the records, I'll have to take 3 shots of Hep B vaccine again otherwise I won't be able to do my placements.

Is there any harm to doing another 3 shots when you have high positive serology? Any prior research done on this before?

Thanks!