Delete all SKUs via bulk action in edit mode

Clear the whole SKU list in one operation instead of deleting items one by one.

1. The deletion clears the SKU list in one operation instead of deleting items individually.

   ✓ 2026年10月19日に製品で確認済み

2. Confirm the change when prompted; the deletion takes effect only after confirmation.

   ✓ 2026年10月19日に製品で確認済み