diff --git a/controller/relay.go b/controller/relay.go
index e70df858..94c75104 100644
--- a/controller/relay.go
+++ b/controller/relay.go
@@ -58,8 +58,7 @@ func Relay(c *gin.Context) {
 	channelName := c.GetString(ctxkey.ChannelName)
 	group := c.GetString(ctxkey.Group)
 	originalModel := c.GetString(ctxkey.OriginalModel)
-	// BUG: bizErr is shared, should not run this function in goroutine to avoid race
-	go processChannelRelayError(ctx, userId, channelId, channelName, bizErr)
+	go processChannelRelayError(ctx, userId, channelId, channelName, *bizErr)
 	requestId := c.GetString(helper.RequestIdKey)
 	retryTimes := config.RetryTimes
 	if err := shouldRetry(c, bizErr.StatusCode); err != nil {
@@ -86,8 +85,7 @@ func Relay(c *gin.Context) {
 		channelId := c.GetInt(ctxkey.ChannelId)
 		lastFailedChannelId = channelId
 		channelName := c.GetString(ctxkey.ChannelName)
-		// BUG: bizErr is in race condition
-		go processChannelRelayError(ctx, userId, channelId, channelName, bizErr)
+		go processChannelRelayError(ctx, userId, channelId, channelName, *bizErr)
 	}
 
 	if bizErr != nil {
@@ -119,7 +117,7 @@ func shouldRetry(c *gin.Context, statusCode int) error {
 	return nil
 }
 
-func processChannelRelayError(ctx context.Context, userId int, channelId int, channelName string, err *model.ErrorWithStatusCode) {
+func processChannelRelayError(ctx context.Context, userId int, channelId int, channelName string, err model.ErrorWithStatusCode) {
 	logger.Errorf(ctx, "relay error (channel id %d, user id: %d): %s", channelId, userId, err.Message)
 	// https://platform.openai.com/docs/guides/error-codes/api-errors
 	if monitor.ShouldDisableChannel(&err.Error, err.StatusCode) {
diff --git a/relay/adaptor/gemini/adaptor.go b/relay/adaptor/gemini/adaptor.go
index 24199773..c362d5f3 100644
--- a/relay/adaptor/gemini/adaptor.go
+++ b/relay/adaptor/gemini/adaptor.go
@@ -24,7 +24,12 @@ func (a *Adaptor) Init(meta *meta.Meta) {
 }
 
 func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
-	version := helper.AssignOrDefault(meta.Config.APIVersion, config.GeminiVersion)
+	defaultVersion := config.GeminiVersion
+	if meta.ActualModelName == "gemini-2.0-flash-exp" {
+		defaultVersion = "v1beta"
+	}
+
+	version := helper.AssignOrDefault(meta.Config.APIVersion, defaultVersion)
 	action := ""
 	switch meta.Mode {
 	case relaymode.Embeddings:
@@ -34,7 +39,11 @@ func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
 	}
 
 	if meta.IsStream {
-		action = "streamGenerateContent?alt=sse"
+		if version == "v1" {
+			action = "streamGenerateContent?alt=sse"
+		} else {
+			action = "streamGenerateContent"
+		}
 	}
 	return fmt.Sprintf("%s/%s/models/%s:%s?key=%s", meta.BaseURL, version, meta.ActualModelName, action, meta.APIKey), nil
 }