If I re-flash my current stock ROM with the same ROM, will it wipe my sd card data?

I need to reflash my ROM, but I don't want to lose my data on my internal SD partition. So what would happen if I flash the same ROM that I have currently?

I have the stock S6 ROM currently on my device (G920TUVU1AOCG_G920TTMB1AOCG_TMB)