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Using addcontributors leads to the following SQL error:

The DPL extension (version 2.01) produced a SQL statement which lead to a Database error.
The reason may be an internal error of DPL or an error which you made,
especially when using DPL options like titleregexp.
Query text is:
SELECT DISTINCT `cdam_page`.page_namespace AS page_namespace,`cdam_page`.page_title AS page_title,`cdam_page`.page_id AS page_id, SUM( ABS( rc.rc_new_len - rc.rc_old_len ) ) AS contribution, rc.rc_user_text AS contributor, `cdam_page`.page_title as sortkey FROM `cdam_recentchanges` AS rc, `cdam_page` INNER JOIN `cdam_categorylinks` AS cl0 ON `cdam_page`.page_id=cl0.cl_from AND (cl0.cl_to='DF') INNER JOIN `cdam_categorylinks` AS cl1 ON `cdam_page`.page_id=cl1.cl_from AND (cl1.cl_to='Developer') WHERE 1=1 AND page.page_id=rc.rc_cur_id AND `cdam_page`.page_is_redirect=0 GROUP BY rc.rc_cur_id ORDER BY page_title ASC LIMIT 0, 500

Error message is:
Unknown column 'page.page_id' in 'where clause' (localhost)

The error is located in line 2136 of DPLMain.php:

            $sSqlWhere   .= ' AND page.page_id=rc.rc_cur_id';

This line should be changed to:

            $sSqlWhere   .= ' AND '.$sPageTable.'.page_id=rc.rc_cur_id';

The original statement refers directly to the 'page' table, which does not exist in cases where a database prefix is used.