Hello,
If it is a Coupon Code which you have got, and it say's that this is a voucher and it is not mentioned whether it is for reactive traditional or any of the specif certification. then you can redeem it on any of the certification available within that amount, but if it is specificially for the Reactive then you can avail that only on Reacive certification.
May I know from where did you get this voucher?

Thanks
Tousif Khan

Thank you for your kind reply.  Do you know who from OutSystems can I contact about this issue?

Hi Tousif, 

Thanks for pointing me to support.  I was unaware that support was available without a standard or enterprise license.  It's great that OutSystems will provide support for those using a personal environment.  Thanks so very much for your help.