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 ('d1fa4f8a45bf14bc6a7888d616e61a17', -1, 1711637666, 1711637666, '2cc8d22b', -10, 0, 0)

Line : 187
File : sessions.php