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) VALUES ('d29ac92dd72367ad053fd1e1aff0e2a7', -1, 1714351999, 1714351999, '0390ee14', -9, 0)

Line : 158
File : sessions.php