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 ('f17f97201dfb88631b7722525baa74ea', -1, 1711632161, 1711632161, '2cde74c7', 0, 0, 0)

Line : 187
File : sessions.php