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 ('6bfae35c2044d0a33fe1a289e3b76aa4', -1, 1711674240, 1711674240, '36a08521', -1, 0, 0)

Line : 187
File : sessions.php