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Fatal error: ..file_version.php... ! (5.6.1.)

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After login is the following error message:

Fatal error: Call to a member function getAttributeKeyID() on a non-object in ..meine_site\concrete\core\models\file_version.php on line 556

Which seems to be due to a single (old) page version. If I want to delete this also comes this error message.

How can I solve this?

Best regards uliII
 
geoffreymorelle replied on at Permalink Reply
Hello, i have the same error on a page.

Can you help us to resolve it ?
cayercreative replied on at Permalink Reply
cayercreative
I received this message. And after digging. I found a post from Rory that said to check to see if you had two attributes with the same handle.

Sure enough i had to $thumb attributes.

I renamed one.

And everythign when back to normal