diff --git a/alphabet/alphabet_contract.go b/alphabet/alphabet_contract.go
index 7a95c74..d015c6d 100644
--- a/alphabet/alphabet_contract.go
+++ b/alphabet/alphabet_contract.go
@@ -37,7 +37,6 @@ func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/audit/audit_contract.go b/audit/audit_contract.go
index 157dc7a..8c21433 100644
--- a/audit/audit_contract.go
+++ b/audit/audit_contract.go
@@ -47,7 +47,6 @@ func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/balance/balance_contract.go b/balance/balance_contract.go
index 8c53079..04c58fd 100644
--- a/balance/balance_contract.go
+++ b/balance/balance_contract.go
@@ -63,7 +63,6 @@ func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/neofs/neofs_contract.go b/neofs/neofs_contract.go
index 50a930b..2cbfedc 100644
--- a/neofs/neofs_contract.go
+++ b/neofs/neofs_contract.go
@@ -47,22 +47,8 @@ var (
 // _deploy sets up initial alphabet node keys.
 func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
-		// TODO(@fyrchik): restore after mainnet update
-		// args := data.([]interface{})
-		// common.CheckVersion(args[len(args)-1].(int))
-
-		ctx := storage.GetContext()
-
-		// TODO(@fyrchik): remove after mainnet update
-		storage.Delete(ctx, common.LegacyOwnerKey)
-
-		nodes := getNodes(ctx, candidatesKey)
-		storage.Delete(ctx, candidatesKey)
-
-		for i := range nodes {
-			key := append([]byte(candidatesKey), nodes[i].PublicKey...)
-			storage.Put(ctx, key, []byte{1})
-		}
+		args := data.([]interface{})
+		common.CheckVersion(args[len(args)-1].(int))
 		return
 	}
 
diff --git a/neofsid/neofsid_contract.go b/neofsid/neofsid_contract.go
index 4720c00..68ab905 100644
--- a/neofsid/neofsid_contract.go
+++ b/neofsid/neofsid_contract.go
@@ -34,7 +34,6 @@ func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/netmap/netmap_contract.go b/netmap/netmap_contract.go
index 4cd36be..a7e3bf6 100644
--- a/netmap/netmap_contract.go
+++ b/netmap/netmap_contract.go
@@ -85,7 +85,6 @@ func _deploy(data interface{}, isUpdate bool) {
 
 	if isUpdate {
 		common.CheckVersion(args.version)
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/proxy/proxy_contract.go b/proxy/proxy_contract.go
index fe357a7..77e1cb3 100644
--- a/proxy/proxy_contract.go
+++ b/proxy/proxy_contract.go
@@ -7,7 +7,6 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/neo"
 	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
-	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 	"github.com/nspcc-dev/neofs-contract/common"
 )
 
@@ -21,10 +20,8 @@ func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
 
 func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
-		ctx := storage.GetContext()
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-		storage.Delete(ctx, common.LegacyOwnerKey)
 		return
 	}
 
diff --git a/reputation/reputation_contract.go b/reputation/reputation_contract.go
index a645959..27751d0 100644
--- a/reputation/reputation_contract.go
+++ b/reputation/reputation_contract.go
@@ -23,8 +23,6 @@ func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
 		args := data.([]interface{})
 		common.CheckVersion(args[len(args)-1].(int))
-
-		storage.Delete(ctx, []byte("contractOwner"))
 		return
 	}
 
diff --git a/subnet/subnet_contract.go b/subnet/subnet_contract.go
index 3827d3d..cd4bcad 100644
--- a/subnet/subnet_contract.go
+++ b/subnet/subnet_contract.go
@@ -58,8 +58,8 @@ const (
 // _deploy function sets up initial list of inner ring public keys.
 func _deploy(data interface{}, isUpdate bool) {
 	if isUpdate {
-		//args := data.([]interface{})
-		//common.CheckVersion(args[len(args)-1].(int))
+		args := data.([]interface{})
+		common.CheckVersion(args[len(args)-1].(int))
 		return
 	}