[keycloak-user] warn in keycloak cluster

[pavel.kokush]

Hello
I run keycloak cluster with Standalone Clustered Configuration. There is
warn in log "The node-identifier attribute on the /subsystem=transactions
is set to the default value. This is a danger for environments running
multiple servers. Please make sure the attribute value is unique."
Should I worry about it? Is it about distributed transactions and keycloak
does not use it?