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 ('3081fa26167b9c2aa4b74c5b19d76b14', -1, 1714025986, 1714025986, '038be92b', -7, 0, 0)

Line : 187
File : sessions.php