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 ('f2cff88d58900a912366e669ecb01bbd', -1, 1713592347, 1713592347, '12db569b', 4, 0, 0)

Line : 187
File : sessions.php