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 ('7f9c0b5ea2032aa1c1b9cba90f2e6f5c', -1, 1714038600, 1714038600, '03857742', -7, 0, 0)

Line : 187
File : sessions.php