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 ('3fe5ec5bd8134f9f20a5df27e0a5f485', -1, 1714006528, 1714006528, '0390248d', -4, 0, 0)

Line : 187
File : sessions.php