thank you very much...its started to reindex from 11 years ago )) but i think this is it ...it shoud work after right???

Hi guys, first of all i want to say that i am new in using bitcoin wallets, and i think i did something wrong. I am using Bitcoin Core for my wallet and i had some money, not much but i want to know hot to open my wallet on future if it happens again.
The problem is  when i want to open my wallet i get this message : ''Wallet loading failed: Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node) ''   now its say something but i dont understand what i have to do.....please if you can help me i wood be very grateful. thanx guys!!!