Why are multiple rows ('versions') saved with eloquent, when I only edit one - laravel

Question

I use a versioning system to save multiple versions of a 'minor' (a model in my application). It contains quite a few fields, like name, goals, requirements, subject and many more. When I save a new version, or 'version 2', using eloquent, it also changes the other version.
I have tried multiple ways of saving the minor, like requesting the first one and updating it like below, or changing each individual item one-by-one.
Minor::limit(1)
->where("id", $id)
->where('version', $_POST['version'])
->first()
->update([
'name' => $_POST['name'],
'ects' => floatval($_POST['ects']),
'contact_hours' => intval($_POST['contact_hours']),
'education_type' => $_POST['education_type'],
'language' => $_POST['language'],
'subject' => Input::get('subject'),
'goals' => Input::get('goals'),
'requirements' => Input::get('requirements'),
]);
It should only save the selected version, but instead, it overwrites all versions of the minor with the same ID and saves them to the database.
How can I prevent this, or does anyone have an idea on how to fix this?

Answer 1

You can try using updateOrCreate method:
Minor::updateOrCreate([
'id' => $id,
'version' => $_POST['version']
],[
'name' => $_POST['name'],
'ects' => floatval($_POST['ects']),
'contact_hours' => intval($_POST['contact_hours']),
'education_type' => $_POST['education_type'],
'language' => $_POST['language'],
'subject' => Input::get('subject'),
'goals' => Input::get('goals'),
'requirements' => Input::get('requirements'),
]);

Answer 2

I still don't know why this happened or how to fix it using the same method. I have however found a way around it. I now update and save the minor with the ->update([...]) method build into eloquent.
Minor::where([["id", "139858"], ["version", Input::get('version')]])
->update([
'name' => Input::get('name'),
'ects' => Input::get('ects'),
'contact_hours' => Input::get('contact_hours'),
'education_type' => Input::get('education_type'),
'language' => Input::get('language'),
'subject' => Input::get('subject'),
'requirements' => Input::get('requirements'),
'goals' => Input::get('goals')
]);
This doesn't seem to alter the other versions. This is the only way I found to make it work, you can't make a variable of the object, change values and then save it. That would overwrite the other versions.