Yes, removing the piwik_archive_* tables fixed it.
But in general, this should be something that Piwik should handle itself, e.g. by discarding the invalid data.
btw: I reverted to v1.12, because the graphs in the dashboard displayed only a "0-line" for all sites, and most widgets for the current year also displayed no data (using current master, just retested). No errors in the log though.
But in general, this should be something that Piwik should handle itself, e.g. by discarding the invalid data.
btw: I reverted to v1.12, because the graphs in the dashboard displayed only a "0-line" for all sites, and most widgets for the current year also displayed no data (using current master, just retested). No errors in the log though.