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private String generateSupplyCode(Long idSuppliesGroup) {
        String supplyGroupCode = suppliesGroupRepository.findActiveCode(idSuppliesGroup);
        Optional<String> optionalLastCodeOfSpecificGroup = suppliesRepository.findLastCodeByStartWithSuppliesGroupCode(supplyGroupCode);

        if (!optionalLastCodeOfSpecificGroup.isPresent()) {
            String startNumber = "0001";
            return supplyGroupCode + Constants.UNDERLINED + startNumber;
        }

        String lastCodeOfSpecificGroup = optionalLastCodeOfSpecificGroup.get();
        int lastUnderlinedIndex = lastCodeOfSpecificGroup.lastIndexOf(Constants.UNDERLINED);
        int currentNumber = Integer.parseInt(lastCodeOfSpecificGroup.substring(lastUnderlinedIndex + 1));
        String formattedNumber = String.format("%0" + NUM_DIGITS + "d", ++currentNumber);
        return supplyGroupCode + Constants.UNDERLINED + formattedNumber;
    }