What happens when you change brand of vaccine?

My puppy who is 7wks 3days got his first DAPPv vaccine with NeoPar when he was 4 weeks old (with breeder). The vet gave him his second DAPPv vaccine as a follow up since it was due this week, but with Nobivac. Is it okay to change brand for the vaccine? What will happen? I am scared and feel so stupid for not specifying that it was NeoPar.