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 ('c9d6dfdd2fa136a1bee1e99d94c1c08b', -1, 1714307875, 1714307875, '0387b759', -4, 0)

Line : 158
File : sessions.php