Problem with a Page text attribute

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I have a package where I install some attributes (not custom attributes) default attributes trough the installations controller. But only one Attribute is missing in my list. If i try to create the attribute trough the concrete5 attributes dashboard/pages/attributes/
I've got an arror that this handle is used... When i look in my Database the attribute is still in db and all looks correctly..

Does anybody has/had the same problem? What can I do?

Lates Concrete5 installation!

Thanks Naume

naumeK