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 ('33357f4c612a99c4ed008e4ad86190dd', -1, 1713952788, 1713952788, '12dc9a29', -4, 0, 0)

Line : 187
File : sessions.php