Issue when opening old version class with variant

[AdiFogel]

I have a type that is defined as:
using PropertiesVariant = sdbusplus::utility::dedup_variant_t<
bool,
std::string>;
using BootOptionDataType =
std::map<std::string, BootOptionDbus::PropertiesVariant>;
using BootOptionsType = std::map<std::string, BootOptionDataType>;

The BootOption maps the property name to its value. The value can be a string of an unknown size and a boolean.
The class has been changed and an additional boolean value has been added. The type actually did not change, because it still a variant of string and boolean.
With the use of versioning, I'm trying to open the binary file, that has the basic class with a code that supports the extended type.
deserialize:
std::ifstream is(path.c_str(), std::ios::in | std::ios::binary);
cereal::BinaryInputArchive iarchive(is);
iarchive(entry);

Load:
Manager::BootOptionsType bootOptionsValues;
archive(bootOptionsValues);

But I'm getting this error:
"Failed cereal to serialize: Invalid 'index' selector when deserializing std::variant"

What is the correct type definition for handling this serialization?
Is there a way that I will be able to deserialize the old file?

Any guidance or insights would be greatly appreciated!