设置未修改局部design图时的图片地址

src/main/java/com/ai/da/service/impl/DesignItemServiceImpl.java

@@ -654,7 +654,8 @@ public class DesignItemServiceImpl extends ServiceImpl<DesignItemMapper, DesignI
                     throw new BusinessException("partial.design.failed");
                 }
                 item.getPartialDesign().setPartialDesignMinioPath(newPath);
-            }else {
+            }else if (Objects.isNull(item.getPartialDesign())
+                    || StringUtil.isNullOrEmpty(item.getPartialDesign().getPartialDesignMinioPath())){
                 item.setPartialDesign(new PartialDesignDTO(null));
             }
         });