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 ('dc893747f6e632f89a54fac1cb5617e2', -1, 1711689054, 1711689054, '03511732', -4, 0, 0)

Line : 187
File : sessions.php