phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('91b02b37bc7e5df6fe59c1a95f1d5300', -1, 1715300840, 1715300840, '12d8d57e', -8, 0, 0)

Line : 189
File : sessions.php