platformx-device-biz/src/main/java/com/by4cloud/platformx/device/service/impl/JcMaxSizeServiceImpl.java
@@ -56,7 +56,7 @@ String s = pre+format+suf+randomNumber+n; return s; }else { Integer currentNumber = dayMax.getCurrentNumber(); Integer currentNumber = dayMax.getCurrentNumber()==null?0:dayMax.getCurrentNumber(); int current = currentNumber+1; String n = padStart(current, maxSize.getLength()); String pre = (maxSize.getUsePrefix() == 0 ? "" : maxSize.getPrefixName());