Repeater Component only showing one record despite HasMany relationship

$repeaterField = Repeater::make('CONTENTS')
        ->schema([
            TextInput::make('DESCRIPTION')->label('Desc')->required(),
            TextInput::make('DIM1')->label('Dim1')->required(),
            TextInput::make('DIM2')->label('Dim2')->required(),
            TextInput::make('DIM3')->label('Dim3')->required(),
            TextInput::make('ACTMASS')->label('Weight')->required(),
        ])
        ->relationship('CONTENTS')
        ->defaultItems(0)
        ->columnSpanFull()
        ->columns(5);

public function CONTENTS(): HasMany
    {      
        return $this->HasMany(Contents::class, 'WAYBILL'); 
    }

public function WAYBILL(): BelongsTo
 {      
    return $this->BelongsTo(Waybill::class, 'WAYBILL'); 
 }

protected function beforeFill(): void
{
    $items = $this->record->contents->toArray();
    dd('beforeFill', $this->record, $items[0], $items[1]);
}