diff --git a/pkg/gateway/mirror/service/discovery.go b/pkg/gateway/mirror/service/discovery.go
index 4538161053..57eed86a5b 100644
--- a/pkg/gateway/mirror/service/discovery.go
+++ b/pkg/gateway/mirror/service/discovery.go
@@ -216,7 +216,7 @@ func (d *discovery) startSync(ctx context.Context, prev map[string]target.Target
 	for addr, name := range curAddrs {
 		// When the status code of a regularly running Register RPC is Unimplemented, the connection to the target will be disconnected
 		// so the status of the resource (CR) may be misaligned. To prevent this, change the status of the resource to Disconnected.
-		if !d.mirr.Exist(ctx, addr) && current[name].Phase == target.MirrorTargetPhaseConnected {
+		if !d.mirr.IsConnected(ctx, addr) && current[name].Phase == target.MirrorTargetPhaseConnected {
 			err = errors.Join(err, d.updateMirrorTargetPhase(ctx, name, target.MirrorTargetPhaseDisconnected))
 		}
 	}
diff --git a/pkg/gateway/mirror/service/mirror.go b/pkg/gateway/mirror/service/mirror.go
index d288dc6edc..786648f94a 100644
--- a/pkg/gateway/mirror/service/mirror.go
+++ b/pkg/gateway/mirror/service/mirror.go
@@ -41,7 +41,6 @@ type Mirror interface {
 	Connect(ctx context.Context, targets ...*payload.Mirror_Target) error
 	Disconnect(ctx context.Context, targets ...*payload.Mirror_Target) error
 	IsConnected(ctx context.Context, addr string) bool
-	Exist(ctx context.Context, addr string) bool
 	MirrorTargets() ([]*payload.Mirror_Target, error)
 	RangeAllMirrorAddr(f func(addr string, _ any) bool)
 }
@@ -306,12 +305,6 @@ func (m *mirr) IsConnected(ctx context.Context, addr string) bool {
 	return m.gateway.GRPCClient().IsConnected(ctx, addr)
 }
 
-// Exist checks if the given address exists in the Mmirror.
-func (m *mirr) Exist(_ context.Context, addr string) bool {
-	_, ok := m.addrl.Load(addr)
-	return ok
-}
-
 // MirrorTargets returns the Mirror targets, including the address of this gateway and the addresses of other Mirror Gateways
 // to which this gateway is currently connected.
 func (m *mirr) MirrorTargets() ([]*payload.Mirror_Target, error) {
diff --git a/pkg/gateway/mirror/service/mirror_test.go b/pkg/gateway/mirror/service/mirror_test.go
index 16b0604d0a..a88f9c3794 100644
--- a/pkg/gateway/mirror/service/mirror_test.go
+++ b/pkg/gateway/mirror/service/mirror_test.go
@@ -962,132 +962,6 @@ func Test_mirr_connectedOtherMirrorAddrs(t *testing.T) {
 // 	}
 // }
 //
-// func Test_mirr_Exist(t *testing.T) {
-// 	type args struct {
-// 		in0  context.Context
-// 		addr string
-// 	}
-// 	type fields struct {
-// 		addrl         sync.Map[string, any]
-// 		selfMirrTgts  []*payload.Mirror_Target
-// 		selfMirrAddrl sync.Map[string, any]
-// 		gwAddrl       sync.Map[string, any]
-// 		eg            errgroup.Group
-// 		registerDur   time.Duration
-// 		gateway       Gateway
-// 	}
-// 	type want struct {
-// 		want bool
-// 	}
-// 	type test struct {
-// 		name       string
-// 		args       args
-// 		fields     fields
-// 		want       want
-// 		checkFunc  func(want, bool) error
-// 		beforeFunc func(*testing.T, args)
-// 		afterFunc  func(*testing.T, args)
-// 	}
-// 	defaultCheckFunc := func(w want, got bool) error {
-// 		if !reflect.DeepEqual(got, w.want) {
-// 			return errors.Errorf("got: \"%#v\",\n\t\t\t\twant: \"%#v\"", got, w.want)
-// 		}
-// 		return nil
-// 	}
-// 	tests := []test{
-// 		// TODO test cases
-// 		/*
-// 		   {
-// 		       name: "test_case_1",
-// 		       args: args {
-// 		           in0:nil,
-// 		           addr:"",
-// 		       },
-// 		       fields: fields {
-// 		           addrl:nil,
-// 		           selfMirrTgts:nil,
-// 		           selfMirrAddrl:nil,
-// 		           gwAddrl:nil,
-// 		           eg:nil,
-// 		           registerDur:nil,
-// 		           gateway:nil,
-// 		       },
-// 		       want: want{},
-// 		       checkFunc: defaultCheckFunc,
-// 		       beforeFunc: func(t *testing.T, args args) {
-// 		           t.Helper()
-// 		       },
-// 		       afterFunc: func(t *testing.T, args args) {
-// 		           t.Helper()
-// 		       },
-// 		   },
-// 		*/
-//
-// 		// TODO test cases
-// 		/*
-// 		   func() test {
-// 		       return test {
-// 		           name: "test_case_2",
-// 		           args: args {
-// 		           in0:nil,
-// 		           addr:"",
-// 		           },
-// 		           fields: fields {
-// 		           addrl:nil,
-// 		           selfMirrTgts:nil,
-// 		           selfMirrAddrl:nil,
-// 		           gwAddrl:nil,
-// 		           eg:nil,
-// 		           registerDur:nil,
-// 		           gateway:nil,
-// 		           },
-// 		           want: want{},
-// 		           checkFunc: defaultCheckFunc,
-// 		           beforeFunc: func(t *testing.T, args args) {
-// 		               t.Helper()
-// 		           },
-// 		           afterFunc: func(t *testing.T, args args) {
-// 		               t.Helper()
-// 		           },
-// 		       }
-// 		   }(),
-// 		*/
-// 	}
-//
-// 	for _, tc := range tests {
-// 		test := tc
-// 		t.Run(test.name, func(tt *testing.T) {
-// 			tt.Parallel()
-// 			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
-// 			if test.beforeFunc != nil {
-// 				test.beforeFunc(tt, test.args)
-// 			}
-// 			if test.afterFunc != nil {
-// 				defer test.afterFunc(tt, test.args)
-// 			}
-// 			checkFunc := test.checkFunc
-// 			if test.checkFunc == nil {
-// 				checkFunc = defaultCheckFunc
-// 			}
-// 			m := &mirr{
-// 				addrl:         test.fields.addrl,
-// 				selfMirrTgts:  test.fields.selfMirrTgts,
-// 				selfMirrAddrl: test.fields.selfMirrAddrl,
-// 				gwAddrl:       test.fields.gwAddrl,
-// 				eg:            test.fields.eg,
-// 				registerDur:   test.fields.registerDur,
-// 				gateway:       test.fields.gateway,
-// 			}
-//
-// 			got := m.Exist(test.args.in0, test.args.addr)
-// 			if err := checkFunc(test.want, got); err != nil {
-// 				tt.Errorf("error = %v", err)
-// 			}
-//
-// 		})
-// 	}
-// }
-//
 // func Test_mirr_RangeAllMirrorAddr(t *testing.T) {
 // 	type args struct {
 // 		f func(addr string, _ any) bool