This type is part of the TeststandPersistedOptions configuration which was added after TestStand 2010 this is why you load the sequence as it depends on that configuration file that does not exist within TestStand 2010. This configuration file is used by the TestStand Process Model to configure some of the reporting options in TestStand.
As an alternate method, to open the sequence file you can uncheck the property "Set earliest version that can use this type" And then saving the sequence file for version 2010. This will allow you to open the sequence file without considering that data type. See the screenshot below for reference.