diff --git a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/ContractManager.java b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/ContractManager.java
index 05fde93d..79d8729f 100644
--- a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/ContractManager.java
+++ b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/ContractManager.java
@@ -88,9 +88,8 @@ public class ContractManager {
     @BizTransactional
     public void revokeContract(RevokeContractRequest request) {
         essLogDao.logRequest("revokeContract", request.getEssContractId(), request);
-        EssContract contract = essContractDao.getOrThrow(request.getEssContractId());
-        BizAssertions.assertFalse(contract.isFinalState(),
-                "合同已是最终状态 {}, 无法撤销", contract.getState().getDescription());
+        // lock when updating state
+        EssContract contract = essContractDao.findForUpdateOrNull(request.getEssContractId());
         EssPerson superAdmin = getContractSuperAdmin(contract);
         essClient.revokeContract(superAdmin, contract.getEssContractId(), request.getReason());
         updateContractState(contract, EssContractState.CANCEL, null, request.getReason());
diff --git a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/ContractSupport.java b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/ContractSupport.java
index 6f25f227..fbeb9a9c 100644
--- a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/ContractSupport.java
+++ b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/ContractSupport.java
@@ -7,7 +7,6 @@ import cn.axzo.nanopart.ess.api.enums.EssContractState;
 import cn.axzo.nanopart.ess.api.request.CreateContractByFileRequest;
 import cn.axzo.nanopart.ess.api.response.CreateContractByFileResponse;
 import cn.axzo.nanopart.ess.server.dao.EssContractDao;
-import cn.axzo.nanopart.ess.server.dao.EssLogDao;
 import cn.axzo.nanopart.ess.server.dao.EssOrgDao;
 import cn.axzo.nanopart.ess.server.entity.EssContract;
 import cn.axzo.nanopart.ess.server.entity.EssOrg;
@@ -33,7 +32,6 @@ public class ContractSupport {
 
     private final EssOrgDao essOrgDao;
     private final EssContractDao essContractDao;
-    private final EssLogDao essLogDao;
 
     public void validateCreateContract(CreateContractInfo contract) {
         checkCreateContractConstraint(contract);
diff --git a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/OrgProfiles.java b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/OrgProfiles.java
index 84f5a30b..20fc6965 100644
--- a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/OrgProfiles.java
+++ b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/support/OrgProfiles.java
@@ -5,7 +5,6 @@ import cn.axzo.nanopart.ess.server.utils.BizAssertions;
 import lombok.AccessLevel;
 import lombok.RequiredArgsConstructor;
 
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 
@@ -17,10 +16,6 @@ public class OrgProfiles {
 
     private final List<OrganizationalUnitVO> profiles;
 
-    public static OrgProfiles empty() {
-        return new OrgProfiles(Collections.emptyList());
-    }
-
     public static OrgProfiles wrap(List<OrganizationalUnitVO> profiles) {
         return new OrgProfiles(profiles);
     }