Eloquent: One to Many Relationships duplicating records on save

I have a one to many relationship set up between two tables: camps (one) and sessions (many). There is one camp and it can have many sessions dates/times. When I create a camp, and related sessions, Eloquent stores a duplicate camp record for every session that I add. So, if I create one camp and one session, then everything is great. However, if I create one camp with 2 sessions, then Eloquent will create 2 identical records in the camps table.

Not the desired outcome; it should be one camp and 2 session. Any ideas as to why this is happening? Thank you.

Controller Create Method

var_dump($dynamicSessions); die('dead');

array (size=1)

1 =>

array (size=4)

  'start_date' => 

    object(Carbon\Carbon)[209]

      public 'date' => string '2019-08-20 00:00:00.000000' (length=26)

      public 'timezone_type' => int 3
      public 'timezone' => string 'UTC' (length=3)

  'end_date' => 

    object(Carbon\Carbon)[211]

      public 'date' => string '2019-08-25 00:00:00.000000' (length=26)

      public 'timezone_type' => int 3

      public 'timezone' => string 'UTC' (length=3)

  'start_time' => 

    object(Carbon\Carbon)[204]

      public 'date' => string '2017-01-12 09:00:00.000000' (length=26)

      public 'timezone_type' => int 3

      public 'timezone' => string 'UTC' (length=3)

  'end_time' =>

    object(Carbon\Carbon)[212]

      public 'date' => string '2017-01-12 12:00:00.000000' (length=26)

      public 'timezone_type' => int 3

      public 'timezone' => string 'UTC' (length=3)

end

    try {
            $camp->sessions()->saveMany($dynamicSessions);
        } catch (Exception $e) {
            Log::error(
                '1LN100: Error while saving entry: ' . $e->getMessage(),
                array_merge($this->logVariables, $request->all())
            );
            throw new Exception('Error 1LN100: Failed to save entry.');
        }

        Log::debug(
            '1LN108: Saved entry',
            array_merge($this->logVariables, $request->all())
        );

Migration file 1 (Camps):

Schema::create('camps', function (Blueprint $table) {
        $table->increments('id');
        $table->timestamps();
    });

Migration file 2 (Sessions):

Schema::create('camp_sessions', function (Blueprint $table) {
        $table->increments('id');
        $table->timestamps();
        $table->integer('camp_id')->unsigned();
        $table->timestamp('start_date')->nullable();
        $table->timestamp('end_date')->nullable();
        $table->timestamp('start_time')->nullable();
        $table->timestamp('end_time')->nullable();
    });

    Schema::table('camp_sessions', function (Blueprint $table) {
        $table->foreign('camp_id')->references('id')->on('camps')->onDelete('cascade');
    });

Model for Migration 1 (Camps):

 protected $fillable = [
    'field',
    'field',
'field',
];

public function sessions()
{
    return $this->hasMany('App\CampSession');
}

Model for Migration 2 (Sessions):

protected $fillable = [
    'start_date',
    'end_date',
    'start_time',
    'end_time'
];

public function camps()
{
    return $this->belongsTo('App\Camp');
}