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 ('2969534872c0635bb16f47d6deed1b28', -1, 1730421060, 1730421060, '0387c804', -1280, 0, 0)

Line : 195
File : sessions.php