知识库-过期文件更新时 不更新失效时间为空的数据

cx-knowledge-base/cx-knowledge-base-common/src/main/java/com/rongwei/bscommon/sys/service/impl/KbKnowledgeLedgerServiceImpl.java

@@ -29,6 +29,7 @@ public class KbKnowledgeLedgerServiceImpl extends ServiceImpl<KbKnowledgeLedgerD
         //修改状态
         this.update(kbKnowledgeLedger, new QueryWrapper<KbKnowledgeLedger>().lambda()
                 .eq(KbKnowledgeLedger::getFilestatus, "生效")
+                .isNotNull(KbKnowledgeLedger::getFailturedate)
                 .lt(KbKnowledgeLedger::getFailturedate, DateUtil.date()));
         return R.ok();
     }