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 ('24ba875693d20e98c2792005cb1db4c0', -1, 1713914600, 1713914600, '0390caa7', 2, 0, 0)

Line : 187
File : sessions.php