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 ('c7205081186202ce77b207c00a95b986', -1, 1711670270, 1711670270, '36d3cb2d', 2, 0, 0)

Line : 187
File : sessions.php