Admin Product Page is broken: «Element with ID 'catalog.product.edit.tab.downloadable.links' already exists»

[dmitrii-fediuk]

When I open any product (all my products are virtual) in admin interface, I got the error below.
I use the latest version: https://github.com/magento/magento2/tree/e5a2d0052e8066f14f5e27f7696d6b0c19b6ff48

Element with ID 'catalog.product.edit.tab.downloadable.links' already exists.

0 lib\internal\Magento\Framework\View\Layout\Data\Structure.php(56): Magento\Framework\Data\Structure->createElement('catalog.product...', Array)

1 lib\internal\Magento\Framework\View\Layout.php(721): Magento\Framework\View\Layout\Data\Structure->createStructuralElement('catalog.product...', 'block', 'Magento\Downloa...')

2 var\generation\Magento\Framework\View\Layout\Interceptor.php(349): Magento\Framework\View\Layout->createBlock('Magento\Downloa...', 'catalog.product...', Array)

3 app\code\Magento\Downloadable\Block\Adminhtml\Catalog\Product\Edit\Tab\Downloadable.php(165): Magento\Framework\View\Layout\Interceptor->createBlock('Magento\Downloa...', 'catalog.product...')

4 lib\internal\Magento\Framework\View\Element\AbstractBlock.php(652): Magento\Downloadable\Block\Adminhtml\Catalog\Product\Edit\Tab\Downloadable->_toHtml()

5 app\code\Magento\Backend\Block\Widget\Tabs.php(384): Magento\Framework\View\Element\AbstractBlock->toHtml()

6 app\code\Magento\Catalog\view\adminhtml\templates\product\edit\tabs.phtml(101): Magento\Backend\Block\Widget\Tabs->getTabContent(Object(Magento\Downloadable\Block\Adminhtml\Catalog\Product\Edit\Tab\Downloadable))

7 lib\internal\Magento\Framework\View\TemplateEngine\Php.php(59): include('C:\work\mage2.p...')

8 lib\internal\Magento\Framework\View\Element\Template.php(255): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\Catalog\Block\Adminhtml\Product\Edit\Tabs), 'C:/work/mage2.p...', Array)

9 lib\internal\Magento\Framework\View\Element\Template.php(275): Magento\Framework\View\Element\Template->fetchView('C:/work/mage2.p...')

10 app\code\Magento\Backend\Block\Template.php(104): Magento\Framework\View\Element\Template->_toHtml()

11 lib\internal\Magento\Framework\View\Element\AbstractBlock.php(652): Magento\Backend\Block\Template->_toHtml()

12 lib\internal\Magento\Framework\View\Layout.php(521): Magento\Framework\View\Element\AbstractBlock->toHtml()

13 lib\internal\Magento\Framework\View\Layout.php(497): Magento\Framework\View\Layout->_renderBlock('product_tabs')

14 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('product_tabs')

15 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('product_tabs')

16 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('product_tabs', true)

17 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('product_tabs')

18 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('left')

19 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('left')

20 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('left')

21 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('left', true)

22 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('left')

23 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('side.col')

24 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('side.col')

25 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('side.col')

26 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('side.col', true)

27 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('side.col')

28 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('page.main.conta...')

29 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('page.main.conta...')

30 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('page.main.conta...')

31 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('page.main.conta...', true)

32 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('page.main.conta...')

33 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('page.content')

34 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('page.content')

35 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('page.content')

36 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('page.content', true)

37 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('page.content')

38 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('page.wrapper')

39 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('page.wrapper')

40 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('page.wrapper')

41 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('page.wrapper', true)

42 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('page.wrapper')

43 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('backend.page')

44 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('backend.page')

45 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('backend.page')

46 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('backend.page', true)

47 lib\internal\Magento\Framework\View\Layout.php(548): Magento\Framework\View\Layout\Interceptor->renderElement('backend.page')

48 lib\internal\Magento\Framework\View\Layout.php(499): Magento\Framework\View\Layout->_renderContainer('root')

49 var\generation\Magento\Framework\View\Layout\Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('root')

50 lib\internal\Magento\Framework\View\Layout.php(473): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('root')

51 var\generation\Magento\Framework\View\Layout\Interceptor.php(193): Magento\Framework\View\Layout->renderElement('root', true)

52 lib\internal\Magento\Framework\View\Layout.php(917): Magento\Framework\View\Layout\Interceptor->renderElement('root')

53 var\generation\Magento\Framework\View\Layout\Interceptor.php(492): Magento\Framework\View\Layout->getOutput()

54 lib\internal\Magento\Framework\View\Result\Page.php(241): Magento\Framework\View\Layout\Interceptor->getOutput()

55 lib\internal\Magento\Framework\View\Result\Layout.php(162): Magento\Framework\View\Result\Page->render(Object(Magento\Framework\App\Response\Http\Interceptor))

56 var\generation\Magento\Backend\Model\View\Result\Page\Interceptor.php(193): Magento\Framework\View\Result\Layout->renderResult(Object(Magento\Framework\App\Response\Http\Interceptor))

57 lib\internal\Magento\Framework\App\Http.php(119): Magento\Backend\Model\View\Result\Page\Interceptor->renderResult(Object(Magento\Framework\App\Response\Http\Interceptor))

58 lib\internal\Magento\Framework\App\Bootstrap.php(257): Magento\Framework\App\Http->launch()

59 index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))

[kandy]

Could you please describe what Magento mode (production / development) are you using?

[dmitrii-fediuk]

Development.
My quick patch is here: https://mage2.pro/t/48

[kokoc]

@dfediuk we are unable to reproduce this issue using provided information. Could you please provide more detailed steps to reproduce the issue?

[GavChap]

I have the same issue. I installed Magento 2 and went straight into the products list on admin, and it gave me the same error. Development mode.

[tomasgriffin]

Can confirm, this issue is caused if you programmatically add an attribute group using \Magento\Eav\Setup\EavSetup::addAttributeGroup() and then add attributes to that group and try to view the product create / edit view.

The issue appears to be caused by the row in eav_attribute_group having NULL as a value for attribute_group_code.

When you create an attribute group via the admin UI - this is populated and the exception is not thrown.

[dmitrii-fediuk]

Today I faced the bug again:

1. I created a simple product using the default product template.
2. I created a new product template with a custom dropdown attribute.
3. I open the product, changed it template to the new and saved the product.
4. After saving the page is reloaded and here is the failure.

My fix still works: https://mage2.pro/t/48

[piotrekkaminski]

internal issue MAGETWO-43627

[dmitrii-fediuk]

The issue appears to be caused by the row in eav_attribute_group having NULL as a value for attribute_group_code.

Attribute group code generation algorithm is incorrect because it returns null for an attribute group with non-Latin name: https://mage2.pro/t/112

[vkholoshenko]

Issue has been fixed in b9f2ad7. Thanks for reporting!