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 ('39af0a16c5be5f8157a1b0b4a9265dc4', -1, 1710818234, 1710818234, '035fe96b', 3, 0, 0)

Line : 187
File : sessions.php