Piwik is a free and open source web analytics application written by a team of international developers that runs on a PHP/MySQL webserver. It tracks online visits to one or more websites and displays reports on these visits for analysis.
If you run into “Error: ViewDataTable ID ‘table’ is already in use!” in Piwik upgrading to 2.16.2, you need to delete this file form your server. It’s no longer needed:
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