laravel create wont store first row of data array - php

Question

I have select options in my form where it has first row when page loads and users can add more rows by AJAX and store all rows data at once.
The problem is that my first row (which is visible when page loads) does not save the data while all other added rows will be saved.
Here is a screenshot of my select options when page loads:
And here it is when user adds new rows:
Here is my sample data that those rows have sent to controller (screenshot #2):
array:2 [▼
0 => array:3 [▼
"name" => "ali"
"username" => "alireza"
"action" => "delete"
]
1 => array:3 [▼
"name" => "eraty"
"username" => "aery"
"action" => "optional"
]
]
As I explained in my screenshots, object 0 data will not be store in the database, not sure why.
Here is my controller:
public function update(Request $request, $id)
{
$this->validate($request, [
'note' => 'required|string',
]);
$post = Post::where('id', $id)
->where('user_id', Auth::id())
->first();
$post->user_id = Auth::id();
$post->note = $request->input('note');
if ($post->save()) {
// social media (add new)
$socialHeir = $request->input('social_media_heir');
$socialAction = $request->input('social_media_action');
$socialNames = $request->input('social_media_name');
$socialUsernames = $request->input('social_media_username');
if (!empty($socialNames)) {
$result_array = [];
foreach ($socialNames as $key => $val) {
$result_array[$key] = [
'name' => $socialNames[$key],
'username' => $socialUsernames[$key],
'action' => $socialAction[$key]
];
}
// dd($result_array); <-- result of this line I shared above (after screenshot 2)
foreach ($result_array as $key => $merge) {
if (!empty($key) && !empty($merge)) {
SocialMedia::create([
'owner_id' => Auth::id(),
'heir_id' => $socialHeir,
'post_id' => $post->id,
'name' => $merge['name'],
'username' => $merge['username'],
'what_to_do' => $merge['action'],
]);
}
}
}
}
return redirect()->route('posts.index');
}
Update
SocialMedia model:
protected $fillable = [
'owner_id',
'heir_id',
'post_id',
'name',
'username',
'what_to_do',
];
public function post()
{
return $this->belongsTo(Post::class);
}
Post model
protected $fillable = [
'user_id',
'note',
];
public function socialMedias()
{
return $this->hasMany(SocialMedia::class);
}

Answer 1

Solved
The issue was in $key in my foreach after removing it, it saves all rows now.
foreach($result_array as $merge) {
if(!empty($merge)) {
SocialMedia::create([
'owner_id' => Auth::id(),
'heir_id' => $socialHeir,
'post_id' => $will->id,
'name' => $merge['name'],
'username' => $merge['username'],
'what_to_do' => $merge['action'],
]);
}
}