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 ('e7e208fdb49e14833b1c94f532a4ae2c', -1, 1714021499, 1714021499, '12e03f57', -7, 0, 0)

Line : 187
File : sessions.php