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 ('179fc0bd451db150984b2a035473439a', -1, 1709626899, 1709626899, '2cc84d5c', -11, 0, 0)

Line : 187
File : sessions.php