phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '247c7fc09d65f623c59eb2b0fe27d6ec' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('247c7fc09d65f623c59eb2b0fe27d6ec', -1, 1769035191, 1769035191, 'd849d879', -4, 0, 0)

Line : 187
File : sessions.php