phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a23a6c9cef3b259b8563e56751144be8' 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 ('a23a6c9cef3b259b8563e56751144be8', -1, 1768364659, 1768364659, 'd849d883', -9, 0, 0)

Line : 187
File : sessions.php