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 ('a117526e5fb9b564fcc3cf9c994e0ddd', -1, 1713582897, 1713582897, '0311064b', -10, 0, 0)

Line : 187
File : sessions.php