Issue with delete functionality using laravel livewire

#showProposal.blade.php

namespace App\Http\Livewire;

use App\Models\Proposal; use Exception; use Livewire\Component; use Livewire\WithPagination;

class ShowProposals extends Component { use WithPagination;

public function mount()

{ $this->listeners = ['deleteProposal']; }

 public function deleteProposal($proposalId)
{
    $proposal = Proposal::find($proposalId);
    if ($proposal) {
        $proposal->delete();
        session()->flash('message', 'Proposal deleted successfully.');
        return redirect()->route('dashboard'); // Adjust the route as needed
    }
}
public function render()
{
    return view('livewire.show-proposals',[
        'proposals' => Proposal::orderBy('updated_at', 'desc')->paginate(10),
    ]);
}

}

got error ##Undefined array key "deleteProposal"

Pls anyone helpme