phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a8856fb125b8bab04e7bf7317519f520' 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 ('a8856fb125b8bab04e7bf7317519f520', -1, 1768286520, 1768286520, '0aff0001', 11, 0, 0)

Line : 199
File : sessions.php