diff --git a/pkg/model/db_schema.go b/pkg/model/db_schema.go
index da15c815..0776aba5 100644
--- a/pkg/model/db_schema.go
+++ b/pkg/model/db_schema.go
@@ -59,18 +59,18 @@ type ViewDoc struct {
 
 //PollingDetail is db struct, it record operation history
 type PollingDetail struct {
-	ID             string                 `json:"id,omitempty" yaml:"id,omitempty"`
-	SessionID      string                 `json:"session_id,omitempty" bson:"session_id," yaml:"session_id,omitempty"`
-	SessionGroup   string                 `json:"session_group,omitempty" bson:"session_group," yaml:"session_group,omitempty"`
-	Domain         string                 `json:"domain,omitempty" yaml:"domain,omitempty"`
-	PollingData    map[string]interface{} `json:"polling_data,omitempty" yaml:"polling_data,omitempty"`
-	Revision       string                 `json:"revision,omitempty" yaml:"revision,omitempty"`
-	IP             string                 `json:"ip,omitempty" yaml:"ip,omitempty"`
-	UserAgent      string                 `json:"user_agent,omitempty" bson:"user_agent," yaml:"user_agent,omitempty"`
-	URLPath        string                 `json:"url_path,omitempty"  bson:"url_path,"  yaml:"url_path,omitempty"`
-	ResponseBody   []*KVDoc               `json:"kv,omitempty"  bson:"kv,"  yaml:"kv,omitempty"`
-	ResponseCode   int                    `json:"response_code,omitempty"  bson:"response_code,"  yaml:"response_code,omitempty"`
-	Timestamp      time.Time              `json:"times_tamp,omitempty" yaml:"times_tamp,omitempty"`
+	ID           string                 `json:"id,omitempty" yaml:"id,omitempty"`
+	SessionID    string                 `json:"session_id,omitempty" bson:"session_id," yaml:"session_id,omitempty"`
+	SessionGroup string                 `json:"session_group,omitempty" bson:"session_group," yaml:"session_group,omitempty"`
+	Domain       string                 `json:"domain,omitempty" yaml:"domain,omitempty"`
+	PollingData  map[string]interface{} `json:"polling_data,omitempty" yaml:"polling_data,omitempty"`
+	Revision     string                 `json:"revision,omitempty" yaml:"revision,omitempty"`
+	IP           string                 `json:"ip,omitempty" yaml:"ip,omitempty"`
+	UserAgent    string                 `json:"user_agent,omitempty" bson:"user_agent," yaml:"user_agent,omitempty"`
+	URLPath      string                 `json:"url_path,omitempty"  bson:"url_path,"  yaml:"url_path,omitempty"`
+	ResponseBody []*KVDoc               `json:"kv,omitempty"  bson:"kv,"  yaml:"kv,omitempty"`
+	ResponseCode int                    `json:"response_code,omitempty"  bson:"response_code,"  yaml:"response_code,omitempty"`
+	Timestamp    time.Time              `json:"times_tamp,omitempty" yaml:"times_tamp,omitempty"`
 }
 
 // UpdateKVRequest is db struct, it contains kv update request params