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 ('603c15e7c02f799320db6d40c98bde21', -1, 1713941174, 1713941174, '1275c4b8', 2, 0, 0)

Line : 187
File : sessions.php