private void addDeviceTypeConflictedWithAllTypes(
            Map<DeviceType, Set<DeviceType>> deviceTypeToExclusiveDeviceTypes,
            @NotNull @ValidDeviceType DeviceType deviceType) {
        for (DeviceType type : DeviceTypeUtil.ALL_AVAILABLE_DEVICE_TYPES) {
            addConflictedDeviceTypes(deviceTypeToExclusiveDeviceTypes, deviceType, type);
        }
    }
Forbidden device types can never connect to turms servers
turms-gateway/src/main/java/im/turms/gateway/domain/session/service/UserSimultaneousLoginService.java