Quiz question soft delete

[alex1897]

I found that in the quiz_questions a unique constraint is set on quiz_id and question_id.

2021_05_22_053359_create_quizzes_table.php

// Quiz Questions Table
Schema::create($this->tableNames['quiz_questions'], function (Blueprint $table) {
    $table->id();
    $table->foreignId('quiz_id')->nullable()->constrained($this->tableNames['quizzes'])->cascadeOnDelete();
    $table->foreignId('question_id')->nullable()->constrained($this->tableNames['questions'])->cascadeOnDelete();
    $table->unsignedFloat('marks')->default(0); //0 means no marks
    $table->unsignedFloat('negative_marks')->default(0); //0 means no negative marks in case of wrong answer
    $table->boolean('is_optional')->default(false); //0 means not optional, 1 means optional
    $table->unsignedInteger('order')->default(0);
    $table->timestamps();
    $table->softDeletes();
    $table->unique(['quiz_id', 'question_id']);
});

When a question is deleted by mistake it cannot be added anymore. I guess it would make sense to remove the unique constraint and handle this also with the validation. What do you think?