phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '47fed27a6f43db311557c8b540c3d2a2' 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 ('47fed27a6f43db311557c8b540c3d2a2', -1, 1770992648, 1770992648, 'd849d821', 13, 0, 0)

Line : 187
File : sessions.php