diff --git a/go.mod b/go.mod
index b0eda8970..9701663f6 100644
--- a/go.mod
+++ b/go.mod
@@ -156,6 +156,5 @@ require (
 	golang.org/x/crypto v0.14.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 )
-replace (
-	github.com/OpenIMSDK/protocol v0.0.47 => github.com/AndrewZuo01/protocol v0.0.0-20240112093520-fd9c53e27b94
-)
\ No newline at end of file
+
+replace github.com/OpenIMSDK/protocol v0.0.47 => github.com/AndrewZuo01/protocol v0.0.0-20240112093520-fd9c53e27b94
diff --git a/go.sum b/go.sum
index 80a02d20a..29b162b93 100644
--- a/go.sum
+++ b/go.sum
@@ -15,11 +15,11 @@ cloud.google.com/go/storage v1.30.1 h1:uOdMxAs8HExqBlnLtnQyP0YkvbiDpdGShGKtx6U/o
 cloud.google.com/go/storage v1.30.1/go.mod h1:NfxhC0UJE1aXSx7CIIbCf7y9HKT7BiccwkR7+P7gN8E=
 firebase.google.com/go v3.13.0+incompatible h1:3TdYC3DDi6aHn20qoRkxwGqNgdjtblwVAyRLQwGn/+4=
 firebase.google.com/go v3.13.0+incompatible/go.mod h1:xlah6XbEyW6tbfSklcfe5FHJIwjt8toICdV5Wh9ptHs=
+github.com/AndrewZuo01/protocol v0.0.0-20240112093520-fd9c53e27b94 h1:o86vkek41ZrQqoBGqyKvS0z6N0uJj64mpzK72OkDZVM=
+github.com/AndrewZuo01/protocol v0.0.0-20240112093520-fd9c53e27b94/go.mod h1:F25dFrwrIx3lkNoiuf6FkCfxuwf8L4Z8UIsdTHP/r0Y=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/IBM/sarama v1.41.3 h1:MWBEJ12vHC8coMjdEXFq/6ftO6DUZnQlFYcxtOJFa7c=
 github.com/IBM/sarama v1.41.3/go.mod h1:Xxho9HkHd4K/MDUo/T/sOqwtX/17D33++E9Wib6hUdQ=
-github.com/OpenIMSDK/protocol v0.0.47 h1:DTJMFSONzqT0i/wa4Q1CtDT/jVATVudIRHcpY1zSWYE=
-github.com/OpenIMSDK/protocol v0.0.47/go.mod h1:F25dFrwrIx3lkNoiuf6FkCfxuwf8L4Z8UIsdTHP/r0Y=
 github.com/OpenIMSDK/tools v0.0.23 h1:xozfrGzhbpNPlDTap5DLVPk+JfgZ/ZyIj4Cuu3/bm9w=
 github.com/OpenIMSDK/tools v0.0.23/go.mod h1:eg+q4A34Qmu73xkY0mt37FHGMCMfC6CtmOnm0kFEGFI=
 github.com/QcloudApi/qcloud_sign_golang v0.0.0-20141224014652-e4130a326409/go.mod h1:1pk82RBxDY/JZnPQrtqHlUFfCctgdorsd9M06fMynOM=
diff --git a/internal/api/msg.go b/internal/api/msg.go
index 03a5bf161..56154a531 100644
--- a/internal/api/msg.go
+++ b/internal/api/msg.go
@@ -417,9 +417,6 @@ func (m *MessageApi) CallbackExample(c *gin.Context) {
 	text := apistruct.TextElem{}
 	picture := apistruct.PictureElem{}
 	mapStruct := make(map[string]any)
-	mapStructSnap := make(map[string]interface{})
-	mapStructBig := make(map[string]interface{})
-	mapStructSource := make(map[string]interface{})
 	// Processing text messages
 	if req.ContentType == constant.Picture || req.ContentType == constant.Text {
 		var err error
@@ -441,6 +438,9 @@ func (m *MessageApi) CallbackExample(c *gin.Context) {
 			log.ZDebug(c, "callback", "text", text)
 			mapStruct["content"] = text.Content
 		} else {
+			mapStructSnap := make(map[string]interface{})
+			mapStructBig := make(map[string]interface{})
+			mapStructSource := make(map[string]interface{})
 			err = json.Unmarshal([]byte(req.Content), &picture)
 			if err != nil {
 				log.ZError(c, "CallbackExample unmarshal failed", err)