Checklist _ product does not exist in the system

Hello experts,

I am customizing Checklist for CRM 7 Service.

However, I am struggling as I have the following error : "Item 20: The product does not exist in the system". Indeed, I have seen that the checklist creates an item with the item category 'FCHK' in the transaction type. However, the product for this item is empty in 'crmd_order' and creates error in the web_ui. Another error appears, which is linked to the first one, 'Item20:The item category FCHK is not permitted for the product'.

Any help on the checklist customizing would be appreciated.

Regards,

Anaïs Jaussaud