Getting Column not found Error at Illuminate\Database\QueryException?

I am working in Laravel app and relating users table with posts table by user_id column. I already have user_id column in posts table. But when I run php artisan db:seed command, I get an error :

`SQLSTATE[42S22]: Column not found: 1054 Unknown column 'user_id ' in 'field list'

Getting below error:

   Illuminate\Database\QueryException 

  SQLSTATE[42S22]: Column not found: 1054 Unknown column 'user_id ' in 'field list' (SQL: insert into `posts` (`user_id `, `title`, `post_image`, `content`, `user_id`, `updated_at`, `created_at`) values (11, Perferendis dolorem eum ex nesciunt., https://lorempixel.com/900/300/?54025, Unde voluptatibus praesentium unde et illum qui quo. Cupiditate pariatur aperiam fugiat perspiciatis. In atque corrupti eius ipsam saepe blanditiis minima., 1, 2020-06-28 08:54:02, 2020-06-28 08:54:02))

  at vendor/laravel/framework/src/Illuminate/Database/Connection.php:671
    667|         // If an exception occurs when attempting to run a query, we'll format the error
    668|         // message to include the bindings with SQL, which will make this exception a
    669|         // lot more helpful to the developer instead of just the database's errors.
    670|         catch (Exception $e) {
  > 671|             throw new QueryException(
    672|                 $query, $this->prepareBindings($bindings), $e
    673|             );
    674|         }
    675| 

  • A column was not found: You might have forgotten to run your migrations. You can run your migrations using `php artisan migrate`. 
    https://laravel.com/docs/master/migrations#running-migrations

      +13 vendor frames 
  14  database/seeds/DatabaseSeeder.php:21
      Illuminate\Database\Eloquent\Relations\HasOneOrMany::save()

      +1 vendor frames 
  16  database/seeds/DatabaseSeeder.php:22
      Illuminate\Support\Collection::each()

I think in your relational function on user model there is a space after user_id. Or you need to find where do you use space after user_id.