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 ('e70b3cb41faf20d72d4a77f7f3b0f7ff', -1, 1713511866, 1713511866, '12de6c12', -10, 0, 0)

Line : 187
File : sessions.php