phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cf18f633fdbf14096293cba0b4cd81b7' 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 ('cf18f633fdbf14096293cba0b4cd81b7', -1, 1765665631, 1765665631, 'd849d86a', 18, 0, 0)

Line : 187
File : sessions.php