MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
RESET {SLAVE | REPLICA} [ALL] [channel_option]
channel_option:
FOR CHANNEL channel
Makes the replica forget its position in the source's binary
log. From MySQL 8.0.22, RESET
SLAVE is deprecated and the alias
RESET REPLICA should be used
instead. In releases before MySQL 8.0.22, use
RESET SLAVE. The statement works
in the same way as before, only the terminology used for the
statement and its output has changed. Both versions of the
statement update the same status variables when used. Please see
the documentation for RESET
REPLICA for a description of the statement.