Merge branch 'wq1' of SH-Arbitrate/Mediation-Backend into dev

ruoyi-admin/src/main/java/com/ruoyi/web/controller/wisdomarbitrate/mscase/MsVideoConferenceController.java

                 }
             }else {
                 // 如果是调解书并且是pdf，则删除之前的在新增
-                if(isMediaBook != null && isMediaBook == 1 && caseId!=null){
+                if(isMediaBook != null && isMediaBook == 1 ){
                     if(StrUtil.isNotEmpty(suffix)&&!suffix.equals("pdf")){
                         return AjaxResult.error("请上传pdf格式文件");
                     }
                     annexType=AnnexTypeEnum.MEDIATE_BOOK_PDF.getCode();
                     // 先删除之前的附件
-                    msCaseAttachMapper.deleteCaseAttachByCasedIdAndType(caseId, annexType);
+                    if(caseId!=null) {
+                        msCaseAttachMapper.deleteCaseAttachByCasedIdAndType(caseId, annexType);
+                    }
                 }
                 Long annexId = saveCaseAttach(annexType, fileName, file.getOriginalFilename(), caseId);
                 // 是否上传到onlyoffice