phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a9b1ddccacaa4188a93d7a70891783a1' for key 'PRIMARY'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a9b1ddccacaa4188a93d7a70891783a1', -1, 1769609479, 1769609479, 'd849d89e', -4, 0, 0)

Line : 187
File : sessions.php