SQL user warning: Duplicate entry '1' for key 1 query

after run cron or update node/comment, i see this message:

user warning: Duplicate entry '1' for key 1 query: xmlsitemap_term_cron INSERT INTO xmlsitemap_term (tid, last_changed, pid) SELECT td.tid, 1195256119, ua.pid FROM term_data td LEFT JOIN url_alias ua ON ua.src = CONCAT('taxonomy/term/', td.tid) OR ua.src = CONCAT('forum/', td.tid) LEFT JOIN xmlsitemap_term xt ON xt.tid = td.tid WHERE xt.tid IS NULL in \includes\database.mysql.inc on line 172.

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= devel log
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trigger_error

\includes\database.mysql.inc: 172

Duplicate entry '1' for key 1 query: xmlsitemap_term_cron INSERT INTO xmlsitemap_term (tid, last_changed, pid) SELECT td.tid, 1195256119, ua.pid FROM term_data td LEFT JOIN url_alias ua ON ua.src = CONCAT('taxonomy/term/', td.tid) OR ua.src = CONCAT('forum/', td.tid) LEFT JOIN xmlsitemap_term xt ON xt.tid = td.tid WHERE xt.tid IS NULL , 512

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_db_query

\includes\database.inc: 200

INSERT INTO xmlsitemap_term (tid, last_changed, pid) SELECT td.tid, 1195256119, ua.pid FROM term_data td LEFT JOIN url_alias ua ON ua.src = CONCAT('taxonomy/term/', td.tid) OR ua.src = CONCAT('forum/', td.tid) LEFT JOIN xmlsitemap_term xt ON xt.tid = td.tid WHERE xt.tid IS NULL

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db_query

\sites\all\modules\xmlsitemap\xmlsitemap_term\xmlsitemap_term.module: 239

INSERT INTO {xmlsitemap_term} (tid, last_changed, pid) SELECT td.tid, %d, ua.pid FROM {term_data} td LEFT JOIN {url_alias} ua ON ua.src = CONCAT('taxonomy/term/', td.tid) OR ua.src = CONCAT('forum/', td.tid) LEFT JOIN {xmlsitemap_term} xt ON xt.tid = td.tid WHERE xt.tid IS NULL , 1195256119

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xmlsitemap_term_cron

call_user_func_array

\includes\module.inc: 406

xmlsitemap_term_cron,

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