diff --git a/pkg/storer/internal/reserve/items.go b/pkg/storer/internal/reserve/items.go
index f834ed0bc13..00cd11e3a7a 100644
--- a/pkg/storer/internal/reserve/items.go
+++ b/pkg/storer/internal/reserve/items.go
@@ -176,7 +176,6 @@ func (c *ChunkBinItem) Marshal() ([]byte, error) {
 	i += 1
 
 	copy(buf[i:i+swarm.HashSize], c.StampHash)
-	i += swarm.HashSize
 	return buf, nil
 }
 
@@ -203,8 +202,6 @@ func (c *ChunkBinItem) Unmarshal(buf []byte) error {
 	i += 1
 
 	c.StampHash = copyBytes(buf[i : i+swarm.HashSize])
-	i += swarm.HashSize
-
 	return nil
 }
 
diff --git a/pkg/storer/migration/step_06.go b/pkg/storer/migration/step_06.go
index 311ccca847c..5de0c5c00f3 100644
--- a/pkg/storer/migration/step_06.go
+++ b/pkg/storer/migration/step_06.go
@@ -184,7 +184,6 @@ func (b *OldBatchRadiusItem) Unmarshal(buf []byte) error {
 	i += swarm.HashSize
 
 	b.BinID = binary.BigEndian.Uint64(buf[i : i+8])
-	i += 8
 	b.StampHash = swarm.EmptyAddress.Bytes()
 	return nil
 }