Wrong migration for Pgsql is generated for string/varchar datatype

[SOHELAHMED7]

Consider a OpenAPI field

name:
    type: string
    example: desc
    maxLength: 150

Now change maxLength as

name:
    type: string
    example: desc
    maxLength: 151

Now run $ ./yii gii/api --ignoreSpecErrors

you will see wrong migrations generated as

<?php

/**
 * Table for CompanyPaymentMethod
 */
class m230530_130000_change_table_table_name extends \yii\db\Migration
{
    public function safeUp()
    {
        $this->alterColumn('{{%table_name}}', 'name', 'string(151) NOT NULL USING "name"::string');
    }

    public function safeDown()
    {
        $this->alterColumn('{{%table_name}}', 'name', 'varchar(150) NOT NULL USING "name"::varchar');
    }
}

By applying this migration, we get below error:

> alter column name in table {{%table_name}} to string(151) NOT NULL USING "name"::string ...Exception: SQLSTATE[42704]: Undefined object: 7 ERROR:  type "string" does not exist at character 91
The SQL being executed was: ALTER TABLE "table_name" ALTER COLUMN "name" TYPE varchar(151) USING "name"::string, ALTER COLUMN "name" DROP DEFAULT, ALTER COLUMN "name" SET NOT NULL