We got this error recently while trying to import a managed solution. As it turned out the we had few OOB reports in our managed solution that was getting imported to TEST.
Removing those OOB reports from the solution, exporting it and importing it again fixed the issue for us and we were able to import the solution successfully.
Helpful post: http://vjcity.blogspot.in/2016/09/trying-to-update-attribute-in-live.html
Hope it helps..
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