diff --git a/server/im_http.go b/server/im_http.go
index 28a74ce..c3e04ab 100644
--- a/server/im_http.go
+++ b/server/im_http.go
@@ -4723,6 +4723,12 @@ func serveIMGroupMyProfile(wrt http.ResponseWriter, req *http.Request, topic str
 		return
 	}
 	if _, err := store.GroupBusiness.UpdateMember(principal.TenantID, topic, principal.Uid, types.GroupMemberPatch{Nickname: &nickname, Version: body.Version}); err != nil {
+		if errors.Is(err, types.ErrNotFound) {
+			logs.Warn.Printf("group[%s]: member profile saved to subscription only; business member row missing for user %s", topic, principal.Uid.UserId())
+			dispatchIMGroupEvents(principal.TenantID)
+			writeIMSuccess(wrt, req, map[string]any{"nickname": nickname, "version": currentVersion + 1, "updated_at": updatedAt.Format(time.RFC3339Nano)})
+			return
+		}
 		if rollbackErr := store.Subs.Update(principal.TenantID, topic, principal.Uid, map[string]any{"Private": selfSub.Private}); rollbackErr != nil {
 			logs.Warn.Printf("group[%s]: failed to roll back member profile: %v", topic, rollbackErr)
 		}
diff --git a/server/im_http_test.go b/server/im_http_test.go
index 95e77eb..ccb55c8 100644
--- a/server/im_http_test.go
+++ b/server/im_http_test.go
@@ -334,6 +334,7 @@ type testGroupBusinessStore struct {
 	updatedSettings types.GroupSettingsPatch
 	updatedMembers  []types.GroupMemberPatch
 	updatedRoleMode types.AccessMode
+	updateMemberErr error
 }
 
 func (s *testGroupBusinessStore) CreateGroup(_ types.TenantID, _ *types.Topic, _ types.Uid, _ any,
@@ -388,6 +389,9 @@ func (s *testGroupBusinessStore) ListMembers(_ types.TenantID, _ string, _ types
 }
 
 func (s *testGroupBusinessStore) UpdateMember(_ types.TenantID, topic string, uid types.Uid, patch types.GroupMemberPatch) (*types.GroupMember, error) {
+	if s.updateMemberErr != nil {
+		return nil, s.updateMemberErr
+	}
 	s.updatedMembers = append(s.updatedMembers, patch)
 	return &types.GroupMember{Topic: topic, UserID: uid, Role: defaultStringPtr(patch.Role, types.GroupMemberRoleMember), MemberStatus: types.GroupMemberStatusActive, Version: 2}, nil
 }
@@ -3780,6 +3784,57 @@ func TestServeIMGroupDetailPatchSettingsProfileAndLeave(t *testing.T) {
 	}
 }
 
+func TestServeIMGroupMyProfileKeepsSubscriptionNicknameWhenBusinessMemberMissing(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	expectIMBearer(t, ctrl, "token-1", 7, 42)
+	oldSubs := store.Subs
+	oldGroupBusiness := store.GroupBusiness
+	subs := mock_store.NewMockSubsPersistenceInterface(ctrl)
+	store.Subs = subs
+	store.GroupBusiness = &testGroupBusinessStore{updateMemberErr: types.ErrNotFound}
+	defer func() {
+		store.Subs = oldSubs
+		store.GroupBusiness = oldGroupBusiness
+	}()
+
+	selfSub := &types.Subscription{
+		TenantID:  7,
+		User:      types.Uid(42).String(),
+		Topic:     "grpAlpha",
+		ModeWant:  types.ModeCFull,
+		ModeGiven: types.ModeCFull,
+		Private:   map[string]any{"comment": "", "profile_version": 1},
+	}
+	var savedPrivate map[string]any
+	subs.EXPECT().Get(types.TenantID(7), "grpAlpha", types.Uid(42), false).Return(selfSub, nil)
+	subs.EXPECT().Update(types.TenantID(7), "grpAlpha", types.Uid(42), gomock.Any()).DoAndReturn(
+		func(_ types.TenantID, _ string, _ types.Uid, update map[string]any) error {
+			private, ok := update["Private"].(map[string]any)
+			if !ok {
+				t.Fatalf("Private update missing: %#v", update)
+			}
+			savedPrivate = private
+			return nil
+		},
+	)
+
+	req := httptest.NewRequest(http.MethodPut, "/v1/im/groups/grpAlpha/members/me/profile", bytes.NewBufferString(`{"nickname":"Coffee 备注","version":1}`))
+	req.Header.Set("Authorization", "Bearer token-1")
+	rec := httptest.NewRecorder()
+	serveIMGroupResource(rec, req)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("profile status: got %d body=%s", rec.Code, rec.Body.String())
+	}
+	if savedPrivate["nickname"] != "Coffee 备注" || savedPrivate["profile_version"] != 2 {
+		t.Fatalf("subscription private not saved: %#v", savedPrivate)
+	}
+	if data := decodeIMHTTPResponse(t, rec).Data.(map[string]any); data["nickname"] != "Coffee 备注" || data["version"].(float64) != 2 {
+		t.Fatalf("unexpected profile response: %#v", data)
+	}
+}
+
 func TestServeIMGroupLeave(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()