docs/content/stable/yugabyte-platform/upgrade/upgrade-yp-xcluster-ybadmin.md
If you have upgraded YugabyteDB Anywhere to version 2.12 or later and xCluster replication for your universes was set up via yb-admin instead of the UI, you need to synchronize the replication after performing the upgrade.
Before synchronizing, you must ensure that the replication group names adhere to the following format:
<source_universe_uuid>_<config_name>
To check the names, execute the following command:
yb-admin get_universe_config | python -m json.tool
An output might be similar to the following:
"producerMap": {
"04dfc615-e2bd-4e56-9a3b-198bceb09e43": {
"consumerTableId": "5dc1a75bced7465fa298ab3a6fea970b",
"producerTableId": "ec26089a41f24d4080cc84b71c6c3391",
producerMap shows the existing stream name (04dfc615-e2bd-4e56-9a3b-198bceb09e43 in the preceding example).
If the names do not match the required format, you need to update the replication group names, as follows:
Change any replication group names as needed using the following command:
yb-admin alter_universe_replication <existing_stream_name> rename_id <source_universe_uuid>_<existing_stream_name>
Verify that all replication group names are in the correct format using the get_universe_config command again:
yb-admin get_universe_config | python -m json.tool
You can synchronize the xCluster configuration using the Sync xcluster config API.
Consider the following example:
curl --location --request POST 'http://<IP_address>:9000/api/v1/customers/<universe_UUID>/xcluster_configs/sync?targetUniverseUUID=<target_universe_UUID>' \
--header 'X-AUTH-YW-API-TOKEN: <your_API_token>' \
--data-raw ''
The target universe UUID in the URL and an empty data flag at the end are required.