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 ('ec6a62d7bf8250ec39992ba5c2e719f6', -1, 1713969986, 1713969986, '12745a8d', -4, 0, 0)

Line : 187
File : sessions.php