Ca ipcc validity period and re registration

sir, i registered my ca ipcc(both group) on 02.02.2013. and cleared 1st group in nov 2013. till now 2nd group is pending. validation of initial registration will be lapse in 02.02.2017. can i submit re-validation form before validation period expire i.e. 02.02.2017. And, should i re-registered 2nd group only or both group