How to delete core data item from a uicollectionviewcell using delegation

my code is trying to peremently delete a item from a core data set. This code works with a basic array like [“sarah”,“Jessica”]. However when trying to delete var itemName I am getting this error Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) at delegateA?.deleteData(indx: (index?.row)!). I dont know how to permanently delete the core data.All my code below is the parts of the code that function in the delete process.

                       class ViewController: UIViewController {
      var itemName : [Item] = []
    var collectionVC = UICollectionView()
    protocol datacollectionProfotocol {
   func deleteData(indx:Int)
  class CustomCell: UICollectionViewCell {
var delegateA: datacollectionProfotocol?
 @objc func ddelete() {
    delegateA?.deleteData(indx: (index?.row)!)

     extension ViewController: UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
      let cell =          collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
          cell.delegateA = self

@timswift Do you still have issues with this?

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