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 ('4909a02a6fd4c7fc4430e8c584300b64', -1, 1713973372, 1713973372, '030fbe90', -2, 0, 0)

Line : 187
File : sessions.php