diff --git a/lib/streamaggr/dedup.go b/lib/streamaggr/dedup.go
index 399e9a3dc..7bb44262e 100644
--- a/lib/streamaggr/dedup.go
+++ b/lib/streamaggr/dedup.go
@@ -4,8 +4,9 @@ import (
 	"sync"
 	"unsafe"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/cespare/xxhash/v2"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 )
 
 const dedupAggrShardsCount = 128
@@ -113,7 +114,7 @@ func (ctx *dedupFlushCtx) reset() {
 	ctx.samples = ctx.samples[:0]
 }
 
-func (da *dedupAggr) flush(f func(samples []pushSample), resetState bool) {
+func (da *dedupAggr) flush(f func(samples []pushSample)) {
 	var wg sync.WaitGroup
 	for i := range da.shards {
 		flushConcurrencyCh <- struct{}{}
@@ -125,7 +126,7 @@ func (da *dedupAggr) flush(f func(samples []pushSample), resetState bool) {
 			}()
 
 			ctx := getDedupFlushCtx()
-			shard.flush(ctx, f, resetState)
+			shard.flush(ctx, f)
 			putDedupFlushCtx(ctx)
 		}(&da.shards[i])
 	}
@@ -193,11 +194,11 @@ func (das *dedupAggrShard) pushSamples(samples []pushSample) {
 	}
 }
 
-func (das *dedupAggrShard) flush(ctx *dedupFlushCtx, f func(samples []pushSample), resetState bool) {
+func (das *dedupAggrShard) flush(ctx *dedupFlushCtx, f func(samples []pushSample)) {
 	das.mu.Lock()
 
 	m := das.m
-	if resetState && len(m) > 0 {
+	if len(m) > 0 {
 		das.m = make(map[string]dedupAggrSample, len(m))
 	}
 
diff --git a/lib/streamaggr/dedup_test.go b/lib/streamaggr/dedup_test.go
index f0b4cc951..38e03678b 100644
--- a/lib/streamaggr/dedup_test.go
+++ b/lib/streamaggr/dedup_test.go
@@ -39,7 +39,7 @@ func TestDedupAggrSerial(t *testing.T) {
 		}
 		mu.Unlock()
 	}
-	da.flush(flushSamples, true)
+	da.flush(flushSamples)
 
 	if !reflect.DeepEqual(expectedSamplesMap, flushedSamplesMap) {
 		t.Fatalf("unexpected samples;\ngot\n%v\nwant\n%v", flushedSamplesMap, expectedSamplesMap)
diff --git a/lib/streamaggr/dedup_timing_test.go b/lib/streamaggr/dedup_timing_test.go
index abb1d0451..d7a05aa64 100644
--- a/lib/streamaggr/dedup_timing_test.go
+++ b/lib/streamaggr/dedup_timing_test.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"sync/atomic"
 	"testing"
-	"time"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
 )
@@ -17,20 +16,6 @@ func BenchmarkDedupAggr(b *testing.B) {
 	}
 }
 
-func BenchmarkDedupAggrFlushSerial(b *testing.B) {
-	as := newTotalAggrState(time.Hour, true, true)
-	benchSamples := newBenchSamples(100_000)
-	da := newDedupAggr()
-	da.pushSamples(benchSamples)
-
-	b.ResetTimer()
-	b.ReportAllocs()
-	b.SetBytes(int64(len(benchSamples)))
-	for i := 0; i < b.N; i++ {
-		da.flush(as.pushSamples, false)
-	}
-}
-
 func benchmarkDedupAggr(b *testing.B, samplesPerPush int) {
 	const loops = 100
 	benchSamples := newBenchSamples(samplesPerPush)
diff --git a/lib/streamaggr/deduplicator.go b/lib/streamaggr/deduplicator.go
index 3ec25f5fa..0212bfd9e 100644
--- a/lib/streamaggr/deduplicator.go
+++ b/lib/streamaggr/deduplicator.go
@@ -166,7 +166,7 @@ func (d *Deduplicator) flush(pushFunc PushFunc, dedupInterval time.Duration) {
 		ctx.labels = labels
 		ctx.samples = samples
 		putDeduplicatorFlushCtx(ctx)
-	}, true)
+	})
 
 	duration := time.Since(startTime)
 	d.dedupFlushDuration.Update(duration.Seconds())
diff --git a/lib/streamaggr/streamaggr.go b/lib/streamaggr/streamaggr.go
index 92fdba57a..34ad118cf 100644
--- a/lib/streamaggr/streamaggr.go
+++ b/lib/streamaggr/streamaggr.go
@@ -747,7 +747,7 @@ func (a *aggregator) dedupFlush(dedupInterval time.Duration) {
 
 	startTime := time.Now()
 
-	a.da.flush(a.pushSamples, true)
+	a.da.flush(a.pushSamples)
 
 	d := time.Since(startTime)
 	a.dedupFlushDuration.Update(d.Seconds())