SQL Statements for Controlling Replica Servers option in a  CHANGE REPLICATION SOURCE TO statement. The source metadata repository and the output of  SHOW REPLICA STATUS  provide the list of servers that are currently ignored. For more information, see Section 17.2.4.2, “Replication Metadata Repositories” , and Section 13.7.7.35, “SHOW REPLICA | SLAVE STATUS Statement” . If a  CHANGE REPLICATION SOURCE TO  statement is issued without any  IGNORE_SERVER_IDS  option, any existing list is preserved. To clear the list of ignored servers, it is necessary to use the option with an empty list: RESET REPLICA ALL  clears  IGNORE_SERVER_IDS . A deprecation warning is issued if  SET GTID_MODE=ON  is issued when any channel has existing server IDs set with IGNORE_SERVER_IDS . Before starting GTID- based replication, check for and clear all ignored server ID lists on the servers involved. The  SHOW REPLICA STATUS  statement displays the list of ignored IDs, if there is one. If you do receive the deprecation warning, you can still clear a list after  gtid_mode=ON  is set by issuing a CHANGE REPLICATION SOURCE TO  statement containing the  IGNORE_SERVER_IDS  option with an empty list. 2764 The user name and host name for the user account must follow the syntax described in Section 6.2.4, “Specifying Account Names” , and the user must not be an anonymous user (with a blank user name) or the CURRENT_USER . The account must have the  REPLICATION_APPLIER privilege, plus the required privileges to execute the transactions replicated on the channel. For details of the privileges required by the account, see Section 17.3.3, “Replication Privilege Checks” . When you restart the replication channel, the privilege checks are applied from that Note CHANGE REPLICATION SOURCE TO IGNORE_SERVER_IDS = (); NETWORK_NAMESPACE The network namespace to use for TCP/IP connections to the replication source server. If this option is omitted, connections from the replica use the default (global) namespace. On platforms that do not implement network namespace support, failure occurs when the replica attempts to connect to the source. For information about network namespaces, see Section 5.1.14, “Network Namespace Support” . NETWORK_NAMESPACE  is available as of MySQL 8.0.22. PRIVILEGE_CHECKS_USER Names a user account that supplies a security context for the specified channel.  NULL , which is the default, means no security context is used. PRIVILEGE_CHECKS_USER  is available as of MySQL 8.0.18.