diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositoryBranch.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositoryBranch.java
index 5c68953d..78fa296d 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositoryBranch.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositoryBranch.java
@@ -37,9 +37,6 @@ public class RepositoryBranch extends Entity<Long> {
     @Column(name = "last_commit_time")
     private LocalDateTime lastCommitTime;
 
-    @Column(name = "is_protected")
-    private Boolean isProtected = false;
-
     @Column(name = "developers_can_push")
     private Boolean developersCanPush = true;
 
@@ -58,6 +55,6 @@ public class RepositoryBranch extends Entity<Long> {
     @Column(name = "project_id", nullable = false)
     private Long projectId;
 
-    @Column(name = "external_system_id")
+    @Column(name = "external_system_id", nullable = false)
     private Long externalSystemId;
 }
\ No newline at end of file
diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/impl/GitServiceIntegrationImpl.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/impl/GitServiceIntegrationImpl.java
index ff95334c..33ea1ecb 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/impl/GitServiceIntegrationImpl.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/impl/GitServiceIntegrationImpl.java
@@ -130,7 +130,8 @@ public class GitServiceIntegrationImpl implements IGitServiceIntegration {
                 entity,
                 String.class
             );
-            log.info("GitLab API raw response for project {}: {}", projectId, rawResponse.getBody());
+            log.info("First branch from GitLab API: {}", 
+                rawResponse.getBody() != null ? rawResponse.getBody().split("},")[0] + "}" : null);
 
             // 然后解析为对象
             ResponseEntity<List<GitBranchResponse>> response = restTemplate.exchange(
@@ -140,12 +141,7 @@ public class GitServiceIntegrationImpl implements IGitServiceIntegration {
                 new ParameterizedTypeReference<>() {}
             );
 
-            List<GitBranchResponse> branches = response.getBody();
-            if (branches != null && !branches.isEmpty()) {
-                log.info("First branch details: {}", branches.get(0));
-            }
-
-            return branches != null ? branches : Collections.emptyList();
+            return response.getBody() != null ? response.getBody() : Collections.emptyList();
         } catch (Exception e) {
             log.error("Failed to fetch git branches for system: {} and project: {}", system.getName(), projectId, e);
             return Collections.emptyList();
diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/response/GitBranchResponse.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/response/GitBranchResponse.java
index 38431e9e..73118a17 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/response/GitBranchResponse.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/integration/response/GitBranchResponse.java
@@ -18,8 +18,6 @@ public class GitBranchResponse {
     @JsonProperty("default")
     private Boolean isDefaultBranch;
 
-    private Boolean isProtected;
-
     @JsonProperty("can_push")
     private Boolean canPush;
 
diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
index 548c6657..a53fba85 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
@@ -203,7 +203,6 @@ public class RepositoryBranchServiceImpl extends BaseServiceImpl<RepositoryBranc
         branch.setProjectId(projectId);
         branch.setName(remoteBranch.getName());
         branch.setIsDefaultBranch(remoteBranch.getIsDefaultBranch());
-        branch.setIsProtected(remoteBranch.getIsProtected());
         branch.setCanPush(remoteBranch.getCanPush());
         branch.setDevelopersCanPush(remoteBranch.getDevelopersCanPush());
         branch.setDevelopersCanMerge(remoteBranch.getDevelopersCanMerge());
diff --git a/backend/src/main/resources/db/migration/V1.0.0__init_schema.sql b/backend/src/main/resources/db/migration/V1.0.0__init_schema.sql
index d73c80a8..e7e1305e 100644
--- a/backend/src/main/resources/db/migration/V1.0.0__init_schema.sql
+++ b/backend/src/main/resources/db/migration/V1.0.0__init_schema.sql
@@ -351,7 +351,6 @@ CREATE TABLE deploy_repo_branch
 	project_id           BIGINT       NOT NULL COMMENT '所属项目ID',
 	external_system_id   BIGINT       NOT NULL COMMENT '外部系统ID',
 	is_default_branch    BIT                   DEFAULT 0 COMMENT '是否为默认分支：0-否，1-是',
-	is_protected         BIT                   DEFAULT 0 COMMENT '是否受保护：0-否，1-是',
 	can_push             BIT                   DEFAULT 1 COMMENT '是否可推送：0-否，1-是',
 	developers_can_push  BIT                   DEFAULT 1 COMMENT '开发者是否可推送：0-否，1-是',
 	developers_can_merge BIT                   DEFAULT 1 COMMENT '开发者是否可合并：0-否，1-是',