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 ('d84e2d8693993c13e8764e2e45d331f5', -1, 1713278342, 1713278342, '12df6cba', -4, 0, 0)

Line : 187
File : sessions.php