diff --git a/app/vminsert/graphite/request_handler.go b/app/vminsert/graphite/request_handler.go
index 73f373a60c..14a557fba1 100644
--- a/app/vminsert/graphite/request_handler.go
+++ b/app/vminsert/graphite/request_handler.go
@@ -32,6 +32,7 @@ func insertRows(at *auth.Token, rows []parser.Row) error {
 	ctx := netstorage.GetInsertCtx()
 	defer netstorage.PutInsertCtx(ctx)
 
+	ctx.Reset() // This line is required for initializing ctx internals.
 	atCopy := *at
 	for i := range rows {
 		r := &rows[i]
diff --git a/app/vminsert/influx/request_handler.go b/app/vminsert/influx/request_handler.go
index a44dff13e2..d6ae61becf 100644
--- a/app/vminsert/influx/request_handler.go
+++ b/app/vminsert/influx/request_handler.go
@@ -59,6 +59,7 @@ func insertRows(at *auth.Token, db string, rows []parser.Row) error {
 	defer putPushCtx(ctx)
 
 	ic := &ctx.Common
+	ic.Reset() // This line is required for initializing ic internals.
 	rowsTotal := 0
 	for i := range rows {
 		r := &rows[i]
diff --git a/app/vminsert/opentsdb/request_handler.go b/app/vminsert/opentsdb/request_handler.go
index c7125211d6..8d4ce0ba26 100644
--- a/app/vminsert/opentsdb/request_handler.go
+++ b/app/vminsert/opentsdb/request_handler.go
@@ -32,6 +32,7 @@ func insertRows(at *auth.Token, rows []parser.Row) error {
 	ctx := netstorage.GetInsertCtx()
 	defer netstorage.PutInsertCtx(ctx)
 
+	ctx.Reset() // This line is required for initializing ctx internals.
 	atCopy := *at
 	for i := range rows {
 		r := &rows[i]
diff --git a/app/vminsert/opentsdbhttp/request_handler.go b/app/vminsert/opentsdbhttp/request_handler.go
index 039db953d1..4dccbe5292 100644
--- a/app/vminsert/opentsdbhttp/request_handler.go
+++ b/app/vminsert/opentsdbhttp/request_handler.go
@@ -50,6 +50,7 @@ func insertRows(at *auth.Token, rows []parser.Row) error {
 	ctx := netstorage.GetInsertCtx()
 	defer netstorage.PutInsertCtx(ctx)
 
+	ctx.Reset() // This line is required for initializing ctx internals.
 	for i := range rows {
 		r := &rows[i]
 		ctx.Labels = ctx.Labels[:0]
diff --git a/app/vminsert/promremotewrite/request_handler.go b/app/vminsert/promremotewrite/request_handler.go
index 8b0b5e58f3..04e29acfb3 100644
--- a/app/vminsert/promremotewrite/request_handler.go
+++ b/app/vminsert/promremotewrite/request_handler.go
@@ -31,6 +31,7 @@ func insertRows(at *auth.Token, timeseries []prompb.TimeSeries) error {
 	ctx := netstorage.GetInsertCtx()
 	defer netstorage.PutInsertCtx(ctx)
 
+	ctx.Reset() // This line is required for initializing ctx internals.
 	rowsTotal := 0
 	for i := range timeseries {
 		ts := &timeseries[i]
diff --git a/app/vminsert/vmimport/request_handler.go b/app/vminsert/vmimport/request_handler.go
index c563be5c04..377f229797 100644
--- a/app/vminsert/vmimport/request_handler.go
+++ b/app/vminsert/vmimport/request_handler.go
@@ -32,6 +32,7 @@ func insertRows(at *auth.Token, rows []parser.Row) error {
 	ctx := netstorage.GetInsertCtx()
 	defer netstorage.PutInsertCtx(ctx)
 
+	ctx.Reset() // This line is required for initializing ctx internals.
 	rowsTotal := 0
 	for i := range rows {
 		r := &rows[i]