In Laravel 6’s database migration, Doctrine\dBal\Exception : Unknown Column type “TinyInteger” requested.

Schema::table('theme_installation_task', function (Blueprint $table) {
	$table->unsignedTinyInteger('step')->default(0)->comment('步骤，1：排队中；2：下载 ZIP；3：解压缩 ZIP；4：执行安装命令；5：复制主题文件；6：同步主题的素材至CDN')->change();
});

   Doctrine\DBAL\Exception  : Unknown column type "tinyinteger" requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspection then you might have forgotten to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information.

  at E:\wwwroot\object\vendor\doctrine\dbal\lib\Doctrine\DBAL\DBALException.php:282
    278|      * @return Exception
    279|      */
    280|     public static function unknownColumnType($name)
    281|     {
  > 282|         return new Exception('Unknown column type "' . $name . '" requested. Any Doctrine type that you use has ' .
    283|             'to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the ' .
    284|             'known types with \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database ' .
    285|             'introspection then you might have forgotten to register all database types for a Doctrine Type. Use ' .
    286|             'AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement ' .

  Exception trace:

  1   Doctrine\DBAL\DBALException::unknownColumnType("tinyinteger")
      E:\wwwroot\object\vendor\doctrine\dbal\lib\Doctrine\DBAL\Types\TypeRegistry.php:37

  2   Doctrine\DBAL\Types\TypeRegistry::get("tinyinteger")
      E:\wwwroot\object\vendor\doctrine\dbal\lib\Doctrine\DBAL\Types\Type.php:237

  Please use the argument -v to see more details.

Schema::table('theme_installation_task', function (Blueprint $table) {
	$table->dropColumn('step');
	$table->unsignedTinyInteger('step')->default(0)->after('processing_failed')->comment('步骤，1：排队中；2：下载 ZIP；3：解压缩 ZIP；4：执行安装命令；5：复制主题文件；6：同步主题的素材至CDN');
});

   Illuminate\Database\QueryException  : SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'step' (SQL: alter table `theme_installation_task` add `step` tinyint unsigned not null default '0' comment '步骤，1：排队中；2：下载 ZIP；3：解压缩 ZIP；4：执行安装命令；5：复制主题文件；6：同步主题的素材至CDN' after `processing_failed`)

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

  Exception trace:

  1   Doctrine\DBAL\Driver\PDO\Exception::("SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'step'")
      E:\wwwroot\object\vendor\doctrine\dbal\lib\Doctrine\DBAL\Driver\PDO\Exception.php:18

  2   Doctrine\DBAL\Driver\PDO\Exception::new(Object(PDOException))
      E:\wwwroot\object\vendor\doctrine\dbal\lib\Doctrine\DBAL\Driver\PDOStatement.php:119

  Please use the argument -v to see more details.

Schema::table('theme_installation_task', function (Blueprint $table) {
	$table->dropColumn('step');
});

Schema::table('theme_installation_task', function (Blueprint $table) {
	$table->unsignedTinyInteger('step')->default(0)->after('processing_failed')->comment('步骤，1：排队中；2：下载 ZIP；3：解压缩 ZIP；4：执行安装命令；5：复制主题文件；6：同步主题的素材至CDN');
});