diff --git a/src/main/java/com/ai/da/service/impl/DesignServiceImpl.java b/src/main/java/com/ai/da/service/impl/DesignServiceImpl.java
index 7ce9d660..b754b62b 100644
--- a/src/main/java/com/ai/da/service/impl/DesignServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/DesignServiceImpl.java
@@ -993,7 +993,7 @@ public class DesignServiceImpl extends ServiceImpl<DesignMapper, Design> impleme
             Assert.notEmpty(details, "Some errors occurred, please restart the design");
             details.forEach(detail -> {
                 List<Long> offset = new ArrayList<>();
-                if (detail.getOffset().equals("null")){
+                if (StringUtil.isNullOrEmpty(detail.getOffset()) || detail.getOffset().equals("null")){
                     offset = Arrays.asList(0L,0L);
                 }else {
                     offset = Arrays.stream(detail.getOffset().replaceAll("\\[|\\]", "").split(",")).map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());