diff --git a/muse-cloud/muse-framework/muse-spring-boot-starter-mybatis/src/main/java/cn/iocoder/muse/framework/mybatis/core/handler/DefaultDBFieldHandler.java b/muse-cloud/muse-framework/muse-spring-boot-starter-mybatis/src/main/java/cn/iocoder/muse/framework/mybatis/core/handler/DefaultDBFieldHandler.java
index f0d4fb65..d0f2decb 100644
--- a/muse-cloud/muse-framework/muse-spring-boot-starter-mybatis/src/main/java/cn/iocoder/muse/framework/mybatis/core/handler/DefaultDBFieldHandler.java
+++ b/muse-cloud/muse-framework/muse-spring-boot-starter-mybatis/src/main/java/cn/iocoder/muse/framework/mybatis/core/handler/DefaultDBFieldHandler.java
@@ -17,6 +17,15 @@ import java.util.Objects;
  */
 public class DefaultDBFieldHandler implements MetaObjectHandler {
 
+    /**
+     * 无登录用户上下文(scheduled/async worker 线程)时,creator/updater 的兜底操作者标识。
+     *
+     * <p>背景:BaseDO 的 creator/updater 带 {@code jdbcType=VARCHAR},fill 字段即使为 null 也会被
+     * MyBatis 强制写入 SQL 列;后台任务无登录用户会写 null 触发 NOT NULL 违约(列定义 NOT NULL DEFAULT '')。
+     * 这里统一兜底为系统标识,保证所有后台任务(AI runtime 调度、事件发布、重试等)写库不被框架字段卡住。</p>
+     */
+    private static final String SYSTEM_OPERATOR = "system";
+
     @Override
     @SuppressWarnings("PatternVariableCanBeUsed")
     public void insertFill(MetaObject metaObject) {
@@ -33,14 +42,14 @@ public class DefaultDBFieldHandler implements MetaObjectHandler {
                 baseDO.setUpdateTime(current);
             }
 
+            // 有登录用户用其 id;scheduled/async worker 无登录上下文时兜底 SYSTEM_OPERATOR,避免 creator/updater 写 null 违约。
             Long userId = SecurityFrameworkUtils.getLoginUserId();
-            // 当前登录用户不为空，创建人为空，则当前登录用户为创建人
-            if (Objects.nonNull(userId) && Objects.isNull(baseDO.getCreator())) {
-                baseDO.setCreator(userId.toString());
+            String operator = Objects.nonNull(userId) ? userId.toString() : SYSTEM_OPERATOR;
+            if (Objects.isNull(baseDO.getCreator())) {
+                baseDO.setCreator(operator);
             }
-            // 当前登录用户不为空，更新人为空，则当前登录用户为更新人
-            if (Objects.nonNull(userId) && Objects.isNull(baseDO.getUpdater())) {
-                baseDO.setUpdater(userId.toString());
+            if (Objects.isNull(baseDO.getUpdater())) {
+                baseDO.setUpdater(operator);
             }
         }
     }
@@ -53,11 +62,11 @@ public class DefaultDBFieldHandler implements MetaObjectHandler {
             setFieldValByName("updateTime", LocalDateTime.now(), metaObject);
         }
 
-        // 当前登录用户不为空，更新人为空，则当前登录用户为更新人
+        // 更新人为空时回填:有登录用户用其 id;scheduled/async worker 无登录上下文时兜底 SYSTEM_OPERATOR,避免 updater 写 null 违约。
         Object modifier = getFieldValByName("updater", metaObject);
-        Long userId = SecurityFrameworkUtils.getLoginUserId();
-        if (Objects.nonNull(userId) && Objects.isNull(modifier)) {
-            setFieldValByName("updater", userId.toString(), metaObject);
+        if (Objects.isNull(modifier)) {
+            Long userId = SecurityFrameworkUtils.getLoginUserId();
+            setFieldValByName("updater", Objects.nonNull(userId) ? userId.toString() : SYSTEM_OPERATOR, metaObject);
         }
     }
 }
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeCallRecorder.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeCallRecorder.java
index 9ae6c759..1c619283 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeCallRecorder.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeCallRecorder.java
@@ -96,8 +96,6 @@ public class MuseAiRuntimeCallRecorder {
         update.setNextRetryAt(succeeded || failure == null ? null : toLocalDateTime(failure.nextRetryAt()));
         update.setFinishedAt(succeeded ? toLocalDateTime(result.completedAt())
                 : toLocalDateTime(failure == null ? Instant.now() : failure.failedAt()));
-        // scheduled worker 线程无登录用户上下文，显式回填 updater(call owner)，避免 auto-fill 落空触发 updater NOT NULL 违约。
-        update.setUpdater(call.getOwnerUserId() == null ? "ai-runtime" : String.valueOf(call.getOwnerUserId()));
         runtimeCallMapper.updateById(update);
         return update;
     }
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeJobDispatcher.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeJobDispatcher.java
index 259b3a92..b180ea5f 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeJobDispatcher.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeJobDispatcher.java
@@ -74,10 +74,8 @@ public class MuseAiRuntimeJobDispatcher {
         update.setErrorMessage(errorMessage);
         update.setFinishedAt(LocalDateTime.now());
         update.setTenantId(claimedJob.getTenantId());
-        // scheduled worker 线程无登录用户上下文，yudao auto-fill 不会回填 updater(new DO)；显式回填 owner 作操作者，
-        // 避免 updater NOT NULL 违约导致写回失败、job 永久 running。
-        update.setUpdater(claimedJob.getOwnerUserId() == null ? "ai-runtime" : String.valueOf(claimedJob.getOwnerUserId()));
         // claim 已经把 job 推到 running；任何前置异常都必须关闭该 job，避免 worker 留下永久 running。
+        // updater/creator 由 DefaultDBFieldHandler 在无登录用户(scheduled worker)时兜底 SYSTEM_OPERATOR。
         TenantUtils.executeIgnore(() -> jobMapper.updateById(update));
     }
 
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeProjectionService.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeProjectionService.java
index d19fc961..5cf8b9a2 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeProjectionService.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/MuseAiRuntimeProjectionService.java
@@ -172,8 +172,6 @@ public class MuseAiRuntimeProjectionService {
         MuseAiGenerationDO update = new MuseAiGenerationDO();
         update.setId(generation.getId());
         update.setCandidateId(suggestionId);
-        // scheduled worker 线程无登录用户上下文，显式回填 updater(job owner)，避免 auto-fill 落空触发 updater NOT NULL 违约。
-        update.setUpdater(job.getOwnerUserId() == null ? "ai-runtime" : String.valueOf(job.getOwnerUserId()));
         generationMapper.updateById(update);
         return suggestionId;
     }
diff --git a/muse-cloud/muse-module-system/muse-module-system-server/src/test/java/cn/iocoder/muse/module/system/service/oauth2/OAuth2TokenServiceImplTest.java b/muse-cloud/muse-module-system/muse-module-system-server/src/test/java/cn/iocoder/muse/module/system/service/oauth2/OAuth2TokenServiceImplTest.java
index 113b321c..d2c0a49f 100644
--- a/muse-cloud/muse-module-system/muse-module-system-server/src/test/java/cn/iocoder/muse/module/system/service/oauth2/OAuth2TokenServiceImplTest.java
+++ b/muse-cloud/muse-module-system/muse-module-system-server/src/test/java/cn/iocoder/muse/module/system/service/oauth2/OAuth2TokenServiceImplTest.java
@@ -78,7 +78,8 @@ public class OAuth2TokenServiceImplTest extends BaseDbAndRedisUnitTest {
         // 断言访问令牌
         OAuth2AccessTokenDO dbAccessTokenDO = oauth2AccessTokenMapper.selectByAccessToken(accessTokenDO.getAccessToken());
         // TODO @芋艿：expiresTime 被屏蔽，仅 win11 会复现，建议后续修复。
-        assertPojoEquals(accessTokenDO, dbAccessTokenDO, "expiresTime", "createTime", "updateTime", "deleted");
+        // creator/updater 由 DefaultDBFieldHandler 在无登录用户(token 创建无登录上下文)时兜底 SYSTEM_OPERATOR，与内存返回对象不一致，对比时忽略。
+        assertPojoEquals(accessTokenDO, dbAccessTokenDO, "expiresTime", "createTime", "updateTime", "deleted", "creator", "updater");
         assertEquals(userId, accessTokenDO.getUserId());
         assertEquals(userType, accessTokenDO.getUserType());
         assertEquals(2, accessTokenDO.getUserInfo().size());
@@ -93,7 +94,7 @@ public class OAuth2TokenServiceImplTest extends BaseDbAndRedisUnitTest {
         assertPojoEquals(accessTokenDO, redisAccessTokenDO, "expiresTime", "createTime", "updateTime", "deleted");
         // 断言刷新令牌
         OAuth2RefreshTokenDO refreshTokenDO = oauth2RefreshTokenMapper.selectList().get(0);
-        assertPojoEquals(accessTokenDO, refreshTokenDO, "id", "expiresTime", "createTime", "updateTime", "deleted");
+        assertPojoEquals(accessTokenDO, refreshTokenDO, "id", "expiresTime", "createTime", "updateTime", "deleted", "creator", "updater");
         assertFalse(DateUtils.isExpired(refreshTokenDO.getExpiresTime()));
     }
 
@@ -181,7 +182,8 @@ public class OAuth2TokenServiceImplTest extends BaseDbAndRedisUnitTest {
         // 断言，新的访问令牌
         OAuth2AccessTokenDO dbAccessTokenDO = oauth2AccessTokenMapper.selectByAccessToken(newAccessTokenDO.getAccessToken());
         // TODO @芋艿：expiresTime 被屏蔽，仅 win11 会复现，建议后续修复。
-        assertPojoEquals(newAccessTokenDO, dbAccessTokenDO, "expiresTime", "createTime", "updateTime", "deleted");
+        // creator/updater 由 DefaultDBFieldHandler 在无登录用户(token 创建无登录上下文)时兜底 SYSTEM_OPERATOR，与内存返回对象不一致，对比时忽略。
+        assertPojoEquals(newAccessTokenDO, dbAccessTokenDO, "expiresTime", "createTime", "updateTime", "deleted", "creator", "updater");
         assertPojoEquals(newAccessTokenDO, refreshTokenDO, "id", "expiresTime", "createTime", "updateTime", "deleted",
                 "creator", "updater");
         assertFalse(DateUtils.isExpired(newAccessTokenDO.getExpiresTime()));