if (!prospectionRepository.findAll().isEmpty()) {
        List<Prospection> all = prospectionRepository.findAll();
        for (int i = 0; i < all.size()-1; i++) {
            for (int k = i+1;k < all.size(); k++) {
                if (all.get(i).getProspectNumber() == all.get(k).getProspectNumber()) {
                    all.remove(all.get(i));
                }
            }
        }
        prospectionRepository.save(all);