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 ('3e18c3776125f7bc60625d5c0756492b', -1, 1714026891, 1714026891, '0390f42c', -10, 0, 0)

Line : 187
File : sessions.php