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 ('9db8af7dd818b066a0d12d7d4a2b24e9', -1, 1711669825, 1711669825, '2ccab776', -10, 0, 0)

Line : 187
File : sessions.php