Low priority issue, should probably be deferred until 6.9.0.
The Statedump code for exporting/importing Internal Key Bindings is (de)serializing the InternalKeyBindingInfos directly. This is not a good solution since these objects contain DynamicUiProperties, which might contain version-specific lists of available choices, etc.
Instead we should export the LinkedHashMap returned by getDataMapToPersist + the name/id/keyalg/... fields in the Internal Key Binding.
Attached is a patch to make this change.