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 ('cd2d1210afcde78b11c2310ddef9f749', -1, 1711671245, 1711671245, '36ad2bd7', -7, 0, 0)

Line : 187
File : sessions.php