I am having Attempt to read property \"product_image\" on bool in my laravel 10 api

I am getting this error Attempt to read property \"product_image\" on bool when i try to delete image from the database and also delete it from my storage folder. My api code is able to delete the image from the database but is not able to delete the image in the storage folder.

ProductController.php file

public function addProductImage(Request $request, $id)
    {
        $fields = $request->validate([
            'product_image' => 'required',
        ]);

        $products = Product::where(['id' => $id])->first();

        if ($request->hasFile('product_image')) {

            $images = $request->file('product_image');
            foreach($images as $image){
                $image_product = new ProductImage;
                $this->productImage = $image->store('product/show/' . Str::random(), 'public');
                $image_product->product_image = $this->productImage;
                $image_product->product_id = $id;
                $image_product->save();
            }
        }

        return response()->json([
            "image_product"=>$image_product,
            "message"=>"Product Image Added Successfully"
        ]);
    }

public function deleteProductImage($id)
    {
        $product_image = ProductImage::findorfail($id)->delete();
        if ($product_image->product_image) {
            Storage::disk('public')->deleteDirectory(dirname($product_image->product_image));
        }

        return [
            'message' => 'Product Image Deleted Successfully'
        ];
    }```

and the error is indicated @ the ```if ($product_image->product_image)```  Any help?