phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9a64e99860b011bd9c030e1a5eb69758' 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 ('9a64e99860b011bd9c030e1a5eb69758', -1, 1766129642, 1766129642, 'd849d857', 5, 0, 0)

Line : 187
File : sessions.php