diff --git a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
index f620cf0..f02f2c7 100644
--- a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
+++ b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
@@ -3,6 +3,7 @@ package com.zt.plat.module.contractorder.service.contract;
 import cn.hutool.json.JSONArray;
 import cn.hutool.json.JSONObject;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.zt.plat.framework.common.pojo.CommonResult;
 import com.zt.plat.framework.common.pojo.PageResult;
 import com.zt.plat.framework.common.util.object.BeanUtils;
@@ -921,6 +922,12 @@ public class ContractServiceImpl implements ContractService {
 
         // 更新合同主信息
         contractMainMapper.updateById(newContractMainDO);
+        // 模板实例ID更新为null
+        if (newContractMainDO.getInstanceId() == null) {
+            contractMainMapper.update(new LambdaUpdateWrapper<>(ContractMainDO.class)
+                    .set(ContractMainDO::getInstanceId, null)
+                    .eq(ContractMainDO::getId, newContractMainDO.getId()));
+        }
 
         if (DictEnum.BSE_CTRT_STS_IN_PROGRESS.getCode().equals(newContractMainDO.getStatus())) {
             // 执行中合同重新提交erp