مشکل cascade

سلام
نمیدونم چرا onDelete رو cascade گذاشتم کار نمیکنه!

class Tashakol extends Model
{
    public function users()
    {
        return $this->hasMany(User::class , 'tashakol_id');
    }

    public function f۱۰۱()
    {
        return $this->hasMany(F۱۰۱::class , 'tashakol_id');
    }
}

این از مایگریشن f۱۰۱

```
public function up()
    {
        Schema::create('f۱۰۱_s', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->bigInteger('tashakol_id')->unsigned();
            $table->foreign('tashakol_id')->references('id')
                ->on('tashakols')
                ->onDelete('cascade')
                ->onUpdate('cascade');
            $table->string('subject');
            $table->string('title');
            $table->string('target');
            $table->string('necessity');
            $table->string('audience');
            $table->string('colleague');
            $table->string('date');
            $table->integer('from');
            $table->integer('to');
            $table->integer('term');
            $table->text('preRun');
            $table->text('duringRun');
            $table->text('laterRun');
            $table->text('manPower');
            $table->string('documentary');
            $table->string('documentaryOfficer');
            $table->string('assessment');
            $table->string('assessmentOfficer');
            $table->integer('status')->default('۰');
            $table->text('comment')->nullable();
            $table->timestamps();
        });
    }
```

این از مایگریشن users

```

public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->bigIncrements('id')->unique();
            $table->string('name');
            $table->string('family');
            $table->string('mobile');
            $table->string('username', ۱۹۱)->unique();
            $table->text('password');
//            $table->text('email')->nullable();
            $table->text('remember_token')->nullable();
            $table->text('pic');
            $table->string('type');
            $table->bigInteger('tashakol_id')->default(۱);
            $table->foreign('tashakol_id')
                ->references('id')
                ->on('tashakols')
                ->onDelete('cascade')
                ->onUpdate('cascade');
            $table->string('daneshjooee')->nullable();
            $table->timestamps();
        });
    }
```