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 ('ce4e6c9015e6b0c115b2b5f8e3a9b2cf', -1, 1713588835, 1713588835, '03916fb7', -10, 0, 0)

Line : 187
File : sessions.php