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 ('5543ec174e3019bddb04cf9dc80e917d', -1, 1711658206, 1711658206, '2cc918ab', -4, 0, 0)

Line : 187
File : sessions.php