Status of error #4627856: new

"Duplicate entry 4-64755-0 for key PRIMARY (INSERT INTO `user_words` (word_id,user_id) \n VALUES (4,64755);)"
"Duplicate entry 4-64755-0 for key PRIMARY (INSERT INTO `user_words` (word_id,user_id) \n VALUES (4,64755);) from mysql->insert"

Program trace:
#0 /var/www/default/src/main/php/model/word/word.php(892): mysql->insert(Array, Array, -3)\n#1 /var/www/default/src/main/php/model/word/word.php(1073): word->add_usr_cfg(-2)\n#2 /var/www/default/http/view.php(70): word->save_view(37, -1)\n#3 {main}