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 ('19b983c722973dd98250f3cb59a76f12', -1, 1711646139, 1711646139, '36cdeead', -10, 0, 0)

Line : 187
File : sessions.php