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 ('9f9f1d0a5a9c29672c8f2c4087a17979', -1, 1713611674, 1713611674, '12bfbd8c', -2, 0, 0)

Line : 187
File : sessions.php