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 ('64827fe2f2b887229017c5f6c92d3229', -1, 1713501908, 1713501908, '039342b2', -7, 0, 0)

Line : 187
File : sessions.php