In the last days in the logs an error like the digit has been appearing, and I have no knowledge of what it is due to:
PHP Fatal error: Uncaught Exception: DB Error: Duplicate entry '0d4mdekdrhota8968hvn9cvadp' for key 'sessions_pkey' Query: INSERT INTO sessions\n\t\t\t\t(session_id, ip_address, user_agent, created, last_used, remember, data, domain)\n\t\t\t\tVALUES\n\t\t\t\t(?, ?, ?, ?, ?, ?, ?, ?) in /lib/pkp/classes/db/DAO.inc.php:703\nStack trace:\n#0 /lib/pkp/classes/db/DAO.inc.php(231): DAO->handleError(Object(ADODB_mysqli), 'INSERT INTO ses...')\n#1 /lib/pkp/classes/session/SessionDAO.inc.php(78)