diff --git a/pkg/morph/event/frostfs/ir_update.go b/pkg/morph/event/frostfs/ir_update.go
deleted file mode 100644
index 62203540f..000000000
--- a/pkg/morph/event/frostfs/ir_update.go
+++ /dev/null
@@ -1,54 +0,0 @@
-package frostfs
-
-import (
-	"crypto/elliptic"
-	"fmt"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
-)
-
-type UpdateInnerRing struct {
-	keys []*keys.PublicKey
-}
-
-// MorphEvent implements Neo:Morph Event interface.
-func (UpdateInnerRing) MorphEvent() {}
-
-func (u UpdateInnerRing) Keys() []*keys.PublicKey { return u.keys }
-
-func ParseUpdateInnerRing(params []stackitem.Item) (event.Event, error) {
-	var (
-		ev  UpdateInnerRing
-		err error
-	)
-
-	if ln := len(params); ln != 1 {
-		return nil, event.WrongNumberOfParameters(1, ln)
-	}
-
-	// parse keys
-	irKeys, err := client.ArrayFromStackItem(params[0])
-	if err != nil {
-		return nil, fmt.Errorf("could not get updated inner ring keys: %w", err)
-	}
-
-	ev.keys = make([]*keys.PublicKey, 0, len(irKeys))
-	for i := range irKeys {
-		rawKey, err := client.BytesFromStackItem(irKeys[i])
-		if err != nil {
-			return nil, fmt.Errorf("could not get updated inner ring public key: %w", err)
-		}
-
-		key, err := keys.NewPublicKeyFromBytes(rawKey, elliptic.P256())
-		if err != nil {
-			return nil, fmt.Errorf("could not parse updated inner ring public key: %w", err)
-		}
-
-		ev.keys = append(ev.keys, key)
-	}
-
-	return ev, nil
-}
diff --git a/pkg/morph/event/frostfs/ir_update_test.go b/pkg/morph/event/frostfs/ir_update_test.go
deleted file mode 100644
index fae87e5f9..000000000
--- a/pkg/morph/event/frostfs/ir_update_test.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package frostfs
-
-import (
-	"testing"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
-	"github.com/stretchr/testify/require"
-)
-
-func genKey(t *testing.T) *keys.PrivateKey {
-	priv, err := keys.NewPrivateKey()
-	require.NoError(t, err)
-	return priv
-}
-
-func TestParseUpdateInnerRing(t *testing.T) {
-	publicKeys := []*keys.PublicKey{
-		genKey(t).PublicKey(),
-		genKey(t).PublicKey(),
-		genKey(t).PublicKey(),
-	}
-
-	t.Run("wrong number of parameters", func(t *testing.T) {
-		prms := []stackitem.Item{
-			stackitem.NewMap(),
-			stackitem.NewMap(),
-		}
-
-		_, err := ParseUpdateInnerRing(prms)
-		require.EqualError(t, err, event.WrongNumberOfParameters(1, len(prms)).Error())
-	})
-
-	t.Run("wrong first parameter", func(t *testing.T) {
-		_, err := ParseUpdateInnerRing([]stackitem.Item{
-			stackitem.NewMap(),
-		})
-
-		require.Error(t, err)
-	})
-
-	t.Run("correct", func(t *testing.T) {
-		ev, err := ParseUpdateInnerRing([]stackitem.Item{
-			stackitem.NewArray([]stackitem.Item{
-				stackitem.NewByteArray(publicKeys[0].Bytes()),
-				stackitem.NewByteArray(publicKeys[1].Bytes()),
-				stackitem.NewByteArray(publicKeys[2].Bytes()),
-			}),
-		})
-		require.NoError(t, err)
-
-		require.Equal(t, UpdateInnerRing{
-			keys: publicKeys,
-		}, ev)
-	})
-}