Checkout-Process - Mobile-Phone required, but not set!

[rethus]

Prestashop 1.5.6

 

I have deactivate the requirement of Phone-Number, and in Country-Settings there is no phone-field which is required. 

But the Checkout-Process stop with the message "Mobile-Phone required".

 

 

I've checked same logs and found this:

 

1)  

[warn] [client ..........196] mod_fcgid: stderr: PHP Fatal error:  Uncaught exception 'PrestaShopException' with message 'Property Address->phone_mobile is empty' in /var/www/clients/client16/web124/web/classes/ObjectModel.php:837, referer: http://www.xxxxxxx.de/bestellung

The function which have Line 8370 is: 

public function validateFields

2) The String for German language is: 

../../translations/de/fields.php:$_FIELDS['Address_2df2ca5cf808744c2977e4073f6b59c8'] = 'Mobilfunk-Nr.';

Any hint, what's wrong here, so that an exeption is thrown?

Edited August 7, 2015 by rethus (see edit history)

[rethus]

Solve it with a dirty hack:

 

Comment the line 128 in classes/Address.php:

'phone_mobile' =>               array('type' => self::TYPE_STRING, 'validate' => 'isPhoneNumber', 'size' => 32),