SAP Message UCMI029 - Selected items: Item &1 is not a balance sheet item

Diagnosis
In the Selected Items, the items you specify on tab pagesClearing - Balance Sheet and Deferred Taxes - Balance Sheet
must always have the itemtype Balance Sheet.
However, item &V1& has a different item type.

Procedure
Change the item type of item &V1&, or do not use this item.