Error adding Constraint (General error 1215) - Orange

Question

I am trying to create two related tables. When trying to 'migrate' them, the error is returned: "SQLSTATE[HY000]: General error: 1215 Cannot add Foreign key Constraint (SQL: alter table 'Companies' add Constraint companies_taxregimeid_foreign' Foreign key ('taxRegimeId') References 'tax_regimes' ('id') on delete CASCADE)".

Company - Model:

    <?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Company extends Model
{
    protected $table = 'companies';
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'taxRegimeId',
        'managerId',
    ];

    public function manager()
    {
        return $this->belongsTo('App\User', 'managerId', 'id');
    }

    public function taxRegime()
    {
        return $this->belongsTo('App\TaxRegime','taxRegimeId', 'id');
    }
}

Company - Migration:

   <?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCompaniesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('companies', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('taxRegimeId')->unsigned();
            $table->integer('managerId')->unsigned();
            $table->timestamps();
        });

        Schema::table('companies', function (Blueprint $table) {
            $table->foreign('managerId')->references('id')->on('users')->onDelete('CASCADE');
        });

        Schema::table('companies', function (Blueprint $table) {
            $table->foreign('taxRegimeId')->references('id')->on('tax_regimes')->onDelete('CASCADE');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('companies');
    }
}

As you can see in the model, I did as in the 'managerId' that follows the same scheme as the entities' relationship (A company has a manager (manager) | A company has a tax regime (taxRegimis)). In 'managerId' it works correctly, but in 'taxRegimeId' it gives this problem that I described at the beginning. What may have caused this problem?