phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6ad55a23e91e6e89715c4f95f999553d' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('6ad55a23e91e6e89715c4f95f999553d', -1, 1772300304, 1772300304, 'd849d834', 2, 0)

Line : 180
File : /www/includes/sessions.php