Column node declaration TypeScript error

[pdowideit]

When creating a custom entry for a TreeTable using <template #body="slotProps">, the data of the row is in slotProps.node.data.
VSCode marks that as an error since the data is expected to be in slotProps.data.

In the upper images treeTableProjects is an TreeTableObject[] with

export type TreeTableObject = {
    key: string;
    data: {};
    children: TreeTableObject[];
}

Is this a bug in the data structure or is it an issue I produced by wrong usage?

[pdowideit]

Using it how VSCode suggests it:

Leads to: