type List  {
  id: ID! @unique
  listEntries: [ListEntry!]! @relation(name: "ListentriesOnLists", cascadeDelete: true)
  name: String!
  site: Site
  toDelete: Boolean! @default(value: false)
}

type ListEntry  {
  createdAt: DateTime!
  updatedAt: DateTime!
  description: String @default(value: "")
  id: ID! @unique
  isCompleted: Boolean! @default(value: false)
  list: List! @relation(name: "ListentriesOnLists", cascadeDelete: false)
  position: Int! @default(value: 1)
  starred: Boolean! @default(value: false)
  task: String!
  person: Person
  category: Category
}

deleteList(parent, { id }, ctx, info) {
      return ctx.db.mutation.deleteList({ where: { id } }, info)
    },

deleteList(id: ID!): List

Uncaught (in promise) Error: GraphQL error: The change you are trying to make would violate the required relation '_ListentriesOnLists' between List and ListEntry

onDelete: CASCADE

ListEntry