# Upgrade guide

# Upgrade to version 4.3

emqx_auth_mnesia plugin now supports rules based on both clientid and username. Previously only one type of filter was supported, as configured in etc/plugins/emqx_auth_mnesia.conf file. In order to import data from the previous EMQ X versions, it is necessary to specify the value of this parameter by passing it as a CLI option:

$ emqx_ctl data import <filename> --env '{"auth.mnesia.as":"username"}'
1

or

$ emqx_ctl data import <filename> --env '{"auth.mnesia.as":"clientid"}'
1

Or by editing the import file using the same format.