diff --git a/ee/api/chalicelib/core/sessions_insights.py b/ee/api/chalicelib/core/sessions_insights.py
index 532e47e19..aced9b802 100644
--- a/ee/api/chalicelib/core/sessions_insights.py
+++ b/ee/api/chalicelib/core/sessions_insights.py
@@ -202,17 +202,17 @@ def query_most_errors_by_period(project_id, start_time, end_time,
     conditions = ["event_type = 'ERROR'"]
     query = f"""WITH toUInt32(toStartOfInterval(toDateTime(%(startTimestamp)s/1000), INTERVAL %(step_size)s second)) AS start,
                      toUInt32(toStartOfInterval(toDateTime(%(endTimestamp)s/1000), INTERVAL %(step_size)s second)) AS end
-                SELECT T1.hh, countIf(T2.session_id != 0) as sessions, T2.name as names, 
+                SELECT T1.hh, countIf(T2.session_id != 0) as sessions, T2.message_name as names, 
                         groupUniqArray(T2.source) as sources 
                 FROM (SELECT arrayJoin(arrayMap(x -> toDateTime(x), range(start, end, %(step_size)s))) as hh) AS T1
-                    LEFT JOIN (SELECT session_id, name, source, message, toStartOfInterval(datetime, INTERVAL %(step_size)s second) as dtime
+                    LEFT JOIN (SELECT session_id, concat(name,': ', message) as message_name, source, toStartOfInterval(datetime, INTERVAL %(step_size)s second) as dtime
                                FROM experimental.events 
                                {sub_query}
                                WHERE project_id = {project_id}
                                     AND datetime >= toDateTime(%(startTimestamp)s/1000)
                                     AND datetime < toDateTime(%(endTimestamp)s/1000)
                                     AND {" AND ".join(conditions)}) AS T2 ON T2.dtime = T1.hh 
-                GROUP BY T1.hh, T2.name 
+                GROUP BY T1.hh, T2.message_name 
                 ORDER BY T1.hh DESC;"""
 
     with ch_client.ClickHouseClient() as conn:
diff --git a/ee/connectors/msgcodec/messages.py b/ee/connectors/msgcodec/messages.py
index 514d2241c..7e2f28152 100644
--- a/ee/connectors/msgcodec/messages.py
+++ b/ee/connectors/msgcodec/messages.py
@@ -71,7 +71,7 @@ class CreateDocument(Message):
     __id__ = 7
 
     def __init__(self, ):
-        
+        pass
 
 
 class CreateElementNode(Message):
@@ -759,20 +759,6 @@ class ResourceTiming(Message):
         self.cached = cached
 
 
-class TabChange(Message):
-    __id__ = 117
-
-    def __init__(self, tab_id):
-        self.tab_id = tab_id
-
-
-class TabData(Message):
-    __id__ = 118
-
-    def __init__(self, tab_id):
-        self.tab_id = tab_id
-
-
 class IssueEvent(Message):
     __id__ = 125