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 ('a058fcc0fd15e59288f1a0dcff7c7514', -1, 1711622252, 1711622252, '12d466ae', -7, 0, 0)

Line : 187
File : sessions.php