phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a2bde26f67ea50f617b74d7e8b0f677f', -1, 1714099302, 1714099302, '12754684', 5, 0, 0)

Line : 187
File : sessions.php