diff --git a/common/database.go b/common/database.go
index 9b52a0d5..df60bdd5 100644
--- a/common/database.go
+++ b/common/database.go
@@ -4,6 +4,7 @@ import "github.com/songquanpeng/one-api/common/helper"
 
 var UsingSQLite = false
 var UsingPostgreSQL = false
+var UsingMySQL = false
 
 var SQLitePath = "one-api.db"
 var SQLiteBusyTimeout = helper.GetOrDefaultEnvInt("SQLITE_BUSY_TIMEOUT", 3000)
diff --git a/model/main.go b/model/main.go
index 49d5a918..f27cdb6f 100644
--- a/model/main.go
+++ b/model/main.go
@@ -56,6 +56,7 @@ func chooseDB() (*gorm.DB, error) {
 		}
 		// Use MySQL
 		logger.SysLog("using MySQL as database")
+		common.UsingMySQL = true
 		return gorm.Open(mysql.Open(dsn), &gorm.Config{
 			PrepareStmt: true, // precompile SQL
 		})
@@ -87,6 +88,9 @@ func InitDB() (err error) {
 		if !config.IsMasterNode {
 			return nil
 		}
+		if common.UsingMySQL {
+			_, _ = sqlDB.Exec("DROP INDEX idx_channels_key ON channels;") // TODO: delete this line when most users have upgraded
+		}
 		logger.SysLog("database migration started")
 		err = db.AutoMigrate(&Channel{})
 		if err != nil {