diff --git a/model/main.go b/model/main.go
index 08e3553a..49ccc56f 100644
--- a/model/main.go
+++ b/model/main.go
@@ -64,6 +64,22 @@ var DB *gorm.DB
 
 var LOG_DB *gorm.DB
 
+// dropIndexIfExists drops a MySQL index only if it exists to avoid noisy 1091 errors
+func dropIndexIfExists(tableName string, indexName string) {
+    if !common.UsingMySQL {
+        return
+    }
+    var count int64
+    // Check index existence via information_schema
+    err := DB.Raw(
+        "SELECT COUNT(1) FROM information_schema.statistics WHERE table_schema = DATABASE() AND table_name = ? AND index_name = ?",
+        tableName, indexName,
+    ).Scan(&count).Error
+    if err == nil && count > 0 {
+        _ = DB.Exec("ALTER TABLE " + tableName + " DROP INDEX " + indexName + ";").Error
+    }
+}
+
 func createRootAccountIfNeed() error {
 	var user User
 	//if user.Status != common.UserStatusEnabled {
@@ -236,11 +252,8 @@ func InitLogDB() (err error) {
 
 func migrateDB() error {
 	// 修复旧版本留下的唯一索引，允许软删除后重新插入同名记录
-	if common.UsingMySQL {
-		// 旧索引可能不存在，忽略删除错误即可
-		_ = DB.Exec("ALTER TABLE models DROP INDEX uk_model_name;").Error
-		_ = DB.Exec("ALTER TABLE vendors DROP INDEX uk_vendor_name;").Error
-	}
+	dropIndexIfExists("models", "uk_model_name")
+	dropIndexIfExists("vendors", "uk_vendor_name")
 	if !common.UsingPostgreSQL {
 		return migrateDBFast()
 	}
@@ -271,10 +284,8 @@ func migrateDB() error {
 
 func migrateDBFast() error {
 	// 修复旧版本留下的唯一索引，允许软删除后重新插入同名记录
-	if common.UsingMySQL {
-		_ = DB.Exec("ALTER TABLE models DROP INDEX uk_model_name;").Error
-		_ = DB.Exec("ALTER TABLE vendors DROP INDEX uk_vendor_name;").Error
-	}
+	dropIndexIfExists("models", "uk_model_name")
+	dropIndexIfExists("vendors", "uk_vendor_name")
 
 	var wg sync.WaitGroup