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 ('77ad2e6f16036955e54094243e4dce3e', -1, 1713571448, 1713571448, '039066ef', -10, 0, 0)

Line : 187
File : sessions.php