3567114 - It's not possible to change the item category for the header level of a BOM item

After configuring the activity 'Assign Item Categories' (ID: 102807) for the needed document type and item category group, maintaining the default item category and manual item categories, it's tried to create a sales order for this BOM item.

However, when adding the item and it's quantity, after the BOM explosion happen correctly, the item category field is greyed out for the main item and it cannot be changed.

SAP S/4HANA Cloud Public Edition

Sales BOM, Sales Kits, BOM explosion, Bill of Materials, Sales Order Processing for Sales Kits, 31Q, item category, manual item category, default item category, manually , KBA , SD-SLS-GF-VA-2CL , Bill Of Material (BOM) & Variant Configuration (Public Cld) , SD-SLS-SO-2CL , Sales Orders (Public Cloud) , How To