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 ('49ee699337295ef87d250f4a42d830ba', -1, 1709019143, 1709019143, '03ec9199', -4, 0, 0)

Line : 187
File : sessions.php