https://learn.microsoft.com/en-us/dotnet/api/system.text.json.serialization.jsonpolymorphicattribute.ignoreunrecognizedtypediscriminators?view=net-9.0
JsonPolymorphicAttribute.IgnoreUnrecognizedTypeDiscriminators Property...
Gets or sets a value that indicates whether the deserializer should ignore any unrecognized type discriminator IDs and revert to the contract of the base type.
property