diff --git a/internal/session/manager.go b/internal/session/manager.go
index 7667d42..4959a07 100644
--- a/internal/session/manager.go
+++ b/internal/session/manager.go
@@ -2,7 +2,6 @@ package session
 
 import (
 	"log"
-	"sync"
 	"time"
 
 	"metazone.cc/metalab/internal/config"
@@ -16,46 +15,18 @@ type userStore interface {
 
 // Manager 会话管理器：创建、验证、销毁、续期
 type Manager struct {
-	store       Store
-	userRepo    userStore
-	cfg         *config.Config
-	mu          sync.Mutex
-	recentLogin map[uint]*loginEntry // uid → 最近一次登录记录（防重复创建）
-}
-
-type loginEntry struct {
-	sid       string
-	ip        string
-	userAgent string
-	createdAt time.Time
+	store    Store
+	userRepo userStore
+	cfg      *config.Config
 }
 
 // NewManager 构造函数
 func NewManager(store Store, userRepo userStore, cfg *config.Config) *Manager {
-	return &Manager{
-		store:       store,
-		userRepo:     userRepo,
-		cfg:          cfg,
-		recentLogin:  make(map[uint]*loginEntry),
-	}
+	return &Manager{store: store, userRepo: userRepo, cfg: cfg}
 }
 
-// Create 创建会话并写入存储（同用户+同 IP+同 UA 在 10 秒内重复调用时返回已有会话，防重复创建）
+// Create 创建会话并写入存储
 func (m *Manager) Create(user *model.User, rememberMe bool, ip, userAgent string) (string, error) {
-	m.mu.Lock()
-	// 幂等检查：同用户+同 IP+同 UA，10 秒内不重复创建
-	if entry, ok := m.recentLogin[user.ID]; ok {
-		if entry.ip == ip && entry.userAgent == userAgent && time.Since(entry.createdAt) < 10*time.Second {
-			// 验证旧会话仍然有效
-			if s, _ := m.store.Get(entry.sid); s != nil {
-				m.mu.Unlock()
-				log.Printf("[SessionManager] Create dedup uid=%d reuse sid=%s", user.ID, entry.sid[:16]+"...")
-				return entry.sid, nil
-			}
-		}
-	}
-	m.mu.Unlock()
-
 	sid, err := NewID()
 	if err != nil {
 		return "", err
@@ -76,11 +47,6 @@ func (m *Manager) Create(user *model.User, rememberMe bool, ip, userAgent string
 	if err := m.store.Set(s); err != nil {
 		return "", err
 	}
-
-	m.mu.Lock()
-	m.recentLogin[user.ID] = &loginEntry{sid: sid, ip: ip, userAgent: userAgent, createdAt: now}
-	m.mu.Unlock()
-
 	log.Printf("[SessionManager] Created sid=%s uid=%d rememberMe=%v ip=%s", sid[:16]+"...", user.ID, rememberMe, ip)
 	return sid, nil
 }