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 ('7f35de55caf7e0dfed556fba6945a493', -1, 1714032071, 1714032071, '039010fe', -7, 0, 0)

Line : 187
File : sessions.php