Activating a Replacement SIM card, with same phone number - How?

I am already with SMARTY (for 1 year approx) and want to keep my Phone Number and stay with SMARTY

I have had a Replacement New SIM Card (which I Requested) from SMARTY, which I am putting in a new refurbished, unlocked, phone.

I have put the new SIM card, with hopefully my old retained number, in my new phone, and my SMARTY Dashboard asks the following Questions:-

"Your phone number

We noticed you activated your SIM. Do you want to bring your phone number to SMARTY?

1.Yes, bring my number.   We will bring your number to SMARTY by the end of the day 11/06/26

2. No, keep new SMARTY number

Confirm "

Question (maybe SMARTY techies can answer):-

Which Option do I choose?

I already have a SMARTY number I already use and want to keep, I've just got a replacement SIM card