phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9c412c64c2fc0b9bd3a3747e3ae0b0fa', -1, 1715039981, 1715039981, '340ee0c5', -8, 0, 0)

Line : 189
File : sessions.php