Select does not record the data

Hi,

I am currently creating a Wizard. My problem is that when I select a piece of data inside the select and I click on the next step of my Wizard, the select returns me an error telling me that no data has been selected. Do you have an idea ?

Here is my code :
 Select::make('type_projet')
    ->multiple()
    ->relationship('type_projet', 'name')
    ->searchable()
    ->preload()
    ->required()
    ->default([157])
    ->columnSpan(2),
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