diff --git a/backend/internal/repository/account_repo.go b/backend/internal/repository/account_repo.go
index 78f739ac..5d7ff70d 100644
--- a/backend/internal/repository/account_repo.go
+++ b/backend/internal/repository/account_repo.go
@@ -317,6 +317,10 @@ func (r *accountRepository) Update(ctx context.Context, account *service.Account
 	if account == nil {
 		return nil
 	}
+	schedulable := account.Schedulable
+	if account.Status == service.StatusError {
+		schedulable = false
+	}
 
 	builder := r.client.Account.UpdateOneID(account.ID).
 		SetName(account.Name).
@@ -329,7 +333,7 @@ func (r *accountRepository) Update(ctx context.Context, account *service.Account
 		SetPriority(account.Priority).
 		SetStatus(account.Status).
 		SetErrorMessage(account.ErrorMessage).
-		SetSchedulable(account.Schedulable).
+		SetSchedulable(schedulable).
 		SetAutoPauseOnExpired(account.AutoPauseOnExpired)
 
 	if account.RateMultiplier != nil {
@@ -716,6 +720,7 @@ func (r *accountRepository) SetError(ctx context.Context, id int64, errorMsg str
 		Where(dbaccount.IDEQ(id)).
 		SetStatus(service.StatusError).
 		SetErrorMessage(errorMsg).
+		SetSchedulable(false).
 		Save(ctx)
 	if err != nil {
 		return err
diff --git a/backend/internal/repository/account_repo_integration_test.go b/backend/internal/repository/account_repo_integration_test.go
index d1cea9eb..87ed49ca 100644
--- a/backend/internal/repository/account_repo_integration_test.go
+++ b/backend/internal/repository/account_repo_integration_test.go
@@ -729,7 +729,7 @@ func (s *AccountRepoSuite) TestUpdateLastUsed() {
 // --- SetError ---
 
 func (s *AccountRepoSuite) TestSetError() {
-	account := mustCreateAccount(s.T(), s.client, &service.Account{Name: "acc-err", Status: service.StatusActive})
+	account := mustCreateAccount(s.T(), s.client, &service.Account{Name: "acc-err", Status: service.StatusActive, Schedulable: true})
 
 	s.Require().NoError(s.repo.SetError(s.ctx, account.ID, "something went wrong"))
 
@@ -737,6 +737,22 @@ func (s *AccountRepoSuite) TestSetError() {
 	s.Require().NoError(err)
 	s.Require().Equal(service.StatusError, got.Status)
 	s.Require().Equal("something went wrong", got.ErrorMessage)
+	s.Require().False(got.Schedulable)
+}
+
+func (s *AccountRepoSuite) TestUpdateErrorStatusUnschedulesAccount() {
+	account := mustCreateAccount(s.T(), s.client, &service.Account{Name: "acc-update-err", Status: service.StatusActive, Schedulable: true})
+	account.Status = service.StatusError
+	account.ErrorMessage = "token revoked"
+	account.Schedulable = true
+
+	s.Require().NoError(s.repo.Update(s.ctx, account))
+
+	got, err := s.repo.GetByID(s.ctx, account.ID)
+	s.Require().NoError(err)
+	s.Require().Equal(service.StatusError, got.Status)
+	s.Require().Equal("token revoked", got.ErrorMessage)
+	s.Require().False(got.Schedulable)
 }
 
 func (s *AccountRepoSuite) TestClearError_SyncSchedulerSnapshotOnRecovery() {
diff --git a/backend/internal/service/token_refresh_service.go b/backend/internal/service/token_refresh_service.go
index 22f4aa29..96428847 100644
--- a/backend/internal/service/token_refresh_service.go
+++ b/backend/internal/service/token_refresh_service.go
@@ -417,11 +417,12 @@ func isNonRetryableRefreshError(err error) bool {
 	}
 	msg := strings.ToLower(err.Error())
 	nonRetryable := []string{
-		"invalid_grant",       // refresh_token 已失效
-		"invalid_client",      // 客户端配置错误
-		"unauthorized_client", // 客户端未授权
-		"access_denied",       // 访问被拒绝
-		"missing_project_id",  // 缺少 project_id
+		"invalid_grant",        // refresh_token 已失效
+		"refresh_token_reused", // OpenAI refresh_token 已被使用，必须重新授权
+		"invalid_client",       // 客户端配置错误
+		"unauthorized_client",  // 客户端未授权
+		"access_denied",        // 访问被拒绝
+		"missing_project_id",   // 缺少 project_id
 		"no refresh token available",
 	}
 	for _, needle := range nonRetryable {
diff --git a/backend/internal/service/token_refresh_service_test.go b/backend/internal/service/token_refresh_service_test.go
index 2179a85e..d80b475e 100644
--- a/backend/internal/service/token_refresh_service_test.go
+++ b/backend/internal/service/token_refresh_service_test.go
@@ -532,6 +532,7 @@ func TestIsNonRetryableRefreshError(t *testing.T) {
 		{name: "network_error", err: errors.New("network timeout"), expected: false},
 		{name: "invalid_grant", err: errors.New("invalid_grant"), expected: true},
 		{name: "invalid_client", err: errors.New("invalid_client"), expected: true},
+		{name: "refresh_token_reused", err: errors.New(`OPENAI_OAUTH_TOKEN_REFRESH_FAILED: token refresh failed: status 401, body: {"error":{"code":"refresh_token_reused"}}`), expected: true},
 		{name: "unauthorized_client", err: errors.New("unauthorized_client"), expected: true},
 		{name: "access_denied", err: errors.New("access_denied"), expected: true},
 		{name: "no_refresh_token", err: errors.New("no refresh token available"), expected: true},