Patch Error : invocation of unknown or unsupported function

[CYT_Dev]

Hi,

I am trying to patch back a new available qty, when an item from a collection is removed.

The collection is a  shopping basket created from a sharepoint list called 'Staff Shop List'

The basket is visible to the user and they can delete items from it

I then want to return the qty back to 'available' stock.

The two Material fields are the same format

I am using this formula

Patch('Staff Shop List',Lookup( 'Staff Shop List', Material = MaterialBought), { Available: Available + ThisItem.Qty })

 I get the error

"invocation of unknown or unsupported function"

Am i missing something from the formula, or is it the wrong way to udpate the available back?

Thanks

[Nogueira1306 · Accepted solution]

Hey! Patch Function is wrong 😕 

ForAll(
    Filter(
        'Staff Shop List';
        Material = MaterialBought
    );
    Patch(
        'Staff Shop List';
        Defaults('Staff Shop List');
        {
            Available: Available + ThisItem.Qty
        }
    )
);;