i have fill ed jee main form but paper 2

but now i am trying to fill paper 1 but they are not allowing me to do this

and error comes that you have already fill this kind of information what should i do

should i change my date of birth

but date should be as that of 10 clas report card

pls help me

Immediately send an e-mail to the executive director,CBSC office ,New delhi(JEE MAINS) regarding your problems.Don,t forget to mention about the details that are required for a registered candidate,as mentioned in the website.I hope they will surely help you in this matter.Their E-mail ID is given in JEE MAINS home page.