phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a9bcc136a1d4f5927738e2fb9b196b65', -1, 1715048855, 1715048855, '030fbe90', -8, 0, 0)

Line : 189
File : sessions.php