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 ('48aaa0b68a5519f4472ddc3c3da03188', -1, 1730417676, 1730417676, '12e31546', -1280, 0, 0)

Line : 195
File : sessions.php