SQLSTATE[42804] Error when trying to heroku run php artisan migrate - laravel

Question

I've been trying to heroku run php artisan migrate from AWS Cloud9 without any success. How can I fix this problem? I would appreciate it very much if someone could help me. Thanks a lot!
I get three errors, all of which are saying
SQLSTATE[42804]: Datatype mismatch: 7 ERROR: column "administered" cannot be cast automatically to type smallint
HINT: You might need to specify "USING administered::smallint"
The migration file in question is as follows:
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class ChangeFilariasisMedicationsTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::table('filariasis_medications', function (Blueprint $table) {
$table->dropColumn('administered');
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::table('filariasis_medications', function (Blueprint $table) {
$table->smallInteger ('administered');
});
}
}
Here is the related model.
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
// 追加
use App\AdministeredDate;
use App\User;
use Illuminate\Notifications\Notifiable;
use App\Notifications\ReminderMail;
class FilariasisMedication extends Model
{
protected $fillable = [
'start_date',
'number_of_times',
'counter',
'administered'
];
protected $dates = [
'start_date',
];
use Notifiable;
/**
* この投薬スケジュールを所有するユーザ（Userモデルとの関係を定義）
*/
public function medication_user()
{
return $this->belongsTo(User::class);
}
/**
* この投薬スケジュールに属する投薬確定日（AdministeredDateモデルとの関係を定義）
*/
public function administered_date()
{
return $this->hasMany(AdministeredDate::class);
}
}
Current description of filariasis_medications table:
mysql> describe filariasis_medications;
enter image description here

Answer 1

You put a space before the parenthesis in your migration, remove it.
from $table->smallInteger ('administered');
to $table->smallInteger('administered');