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 ('8ce4f4d9c86064e461a44df7224fbc80', -1, 1730420212, 1730420212, '127507d4', 27, 0, 0)

Line : 195
File : sessions.php