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) VALUES ('11ebd10b9774586e3edc1b2a2cb77b5c', -1, 1715932789, 1715932789, '12df6c69', 15, 0)

Line : 158
File : sessions.php