API returns parent categories as null

[flexlixrup]

{ "id": "f25845a1-f458-4637-a700-2e30cf110fc1", "name": "Getränke", "subCategories": [ { "id": "26c783ee-006f-406d-958c-157b67f8545b", "name": "Alkohol", "subCategories": [ { "id": "af346803-e874-4086-8727-8cc286d841c7", "name": "Bier", "subCategories": [], "parentCategory": null }, { "id": "3e69a323-ab59-4638-bef2-32682fb5ba0d", "name": "Sekt", "subCategories": [], "parentCategory": null }, { "id": "3832ff32-fe8e-482a-927d-42459816a441", "name": "Spirituosen", "subCategories": [], "parentCategory": null }, { "id": "f60a7755-cb8b-4ee7-a875-eadcdada3726", "name": "Wein", "subCategories": [], "parentCategory": null } ], "parentCategory": null }, { "id": "8f8a4623-77e4-41dd-b3eb-fb7df13de774", "name": "Fruchtsaft", "subCategories": [], "parentCategory": null }, { "id": "478d6109-771c-407c-bf1c-3097be80c4e7", "name": "Kaffee", "subCategories": [], "parentCategory": null }, { "id": "e85d2da2-f4f6-42c4-81d1-60c017830cf0", "name": "Limonade", "subCategories": [], "parentCategory": null }, { "id": "ca7a607d-bcd5-43c8-a08b-5024938b7cdc", "name": "Tee", "subCategories": [], "parentCategory": null }, { "id": "26519f6c-0913-4d6d-95cb-31bd27aa36e4", "name": "Wasser", "subCategories": [], "parentCategory": null } ], "parentCategory": null },

The API request for categories returns all parentCategories of subcategories as null instead of the expected parent category