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 ('9cb1b7680fa3c3963f0b7b45b9a72f9f', -1, 1711720616, 1711720616, '23afb4ff', 3, 0, 0)

Line : 187
File : sessions.php