When you seed multiple relationships of different types and targets, all the rel data is loaded as if it was the last relationship in the seeding (example seeding: https://musicbrainz.org/event/create?edit-event.name=Aphrodite%20Symphony%3A%20I.%20Adagio%20-%20Allegro%20con%20fuco&edit-event.type_id=1&edit-event.setlist=*%20%5B349cda06-9260-44b2-b75a-50eaa8b656ec%7CAphrodite%20Symphony%3A%20I.%20Adagio%20-%20Allegro%20con%20fuco%5D%0A%40%20%5B734b7067-30ff-46cc-8521-bf73d7ede404%7CAnton%C3%ADn%20Vranick%C3%BD%5D&edit-event.edit_note=%0A%20%E2%80%94%0AGM%20script%3A%20%22MusicBrainz%20recording%3A%20Seed%20concert%20event%20from%20recording%22%20(2020.9.22)%0A%0A&rels.0.target=37f9163d-d034-444e-ae72-cc5b7946164c&rels.0.type=936c7c95-3156-3889-a062-8a0cd57f8946&rels.1.target=53a9434a-8be1-41b3-b365-8a000c111235&rels.1.type=936c7c95-3156-3889-a062-8a0cd57f8946&rels.2.target=709449c4-3198-42dd-ac16-967d1070d057&rels.2.type=e2c6f697-07dc-38b1-be0b-83d740165532&rels.3.target=5907dd4b-b570-4a19-b589-f59a128872dd&rels.3.type=b06e6732-2603-47d3-8a49-9f589b430483)