For once, she is not referring to her personal life, but her professional life. What could be there in her past that she would be so embarrassed about? Hansika is talking about an old film that she hopes people forget about.
She was once a part of a film called Seeta Ramula Kalyanam Lankalo, which also featured Nithiin. Now, we know that many Telugu films these days are dubbed into Hindi and other languages for the regional audiences. The same happened to this one too.
The only problem is, Hansika is embarrassed with this film to the point of trying to stall its release in Tamil. Earlier, she was irked with the film's dubbing into Hindi. Not just her, her mother also has a problem with it.
Good film or bad, everyone improves over time. If this situation has a bright side, it is the fact that viewers can see how much the actress has progressed since then. Change is a constant and past should not be regretted. Hansika currently has more than 10 films in her kitty.