ImportColumn::getRelationship()

I have a belongsToMany relationship between User and Hobbies and I am trying to implement the ImportAction. If I expect a string with the name of the hobby in the excel, how do I validate it in order to import it? The relationships are correctly defined in the models. #import The error i got: Filament\Actions\Imports\ImportColumn::getRelationship(): Return value must be of type ?Illuminate\Database\Eloquent\Relations\BelongsTo, Illuminate\Database\Eloquent\Relations\BelongsToMany returned