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 ('a37e2bbfe005a48aaadcc12ef48db215', -1, 1714741847, 1714741847, '0311ae9c', -7, 0, 0)

Line : 187
File : sessions.php