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 ('cd36c105ef126fe8a2ba90080e26d10f', -1, 1713543004, 1713543004, '0d3a3983', -8, 0, 0)

Line : 187
File : sessions.php