Not a problem.
For me, I would clean and sanitize the
grow rocks, as well as the
nutrient reservoir and
pump. It would be a lot of work and a waist of
nutrients but that's the only way I could be sure I got rid any fungus or bacteria, as well as of all the spores that might infect the new plants. Spores will still be in the air, but I would try to get rid of everything I could before replanting.