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 ('da78635a8d2a8e1ff04f0dc148e7834f', -1, 1710840838, 1710840838, '22e642b1', -1, 0, 0)

Line : 187
File : sessions.php