https://github.com/NeTEx-CEN/NeTEx/blob/master/xsd/netex_part_2/part2_journeyTimes/netex_vehicleJourneyFrequency_version.xsd#L294
https://github.com/NeTEx-CEN/NeTEx/blob/master/xsd/netex_framework/netex_genericFramework/netex_grouping_version.xsd#L108
warning: Converting parent field {http://www.netex.org.uk/netex}GroupOfEntities_VersionStructure::Description to a list to match child class {http://www.netex.org.uk/netex}HeadwayJourneyGroup
Removing the extra Description in HeadwayJourneyGroupGroup resolves the issue.
In Next the same would go for PathLinkInSequenceGroup, removing the extra Description resolves the issue.