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 ('0a7a96b7b4b1e7465d308cf5e9f18d7a', -1, 1714038174, 1714038174, '340f3ba3', -2, 0, 0)

Line : 187
File : sessions.php