phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '81a31c1ff8c497179810ae33c2cf94ca' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('81a31c1ff8c497179810ae33c2cf94ca', -1, 1769844487, 1769844487, 'd849d86e', 1, 0, 0)

Line : 187
File : sessions.php