How can this be possible?.
If you had followed proper guidelines while filling jee mains application form thwn this problem can't occur.Just reconfirm that you have entered all things correctly.If  the issue still persists you can contact jee through email or telephone numbers mentioned in jee mains website.

If you need technical assistance in case of registration for the JEE mains registration then please contact jee mains helpline numbers: 

7042399520, 7042399521, 7042399525, 7042399526

Because i am not able to understand what your problem exactly is ?

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