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 ('b997f2a45cf1f8abad15b3fa5d991659', -1, 1713823167, 1713823167, '2cc961e0', -8, 0, 0)

Line : 187
File : sessions.php