<filters>
                <mod-cluster name="load-balancer" management-socket-binding="mcmp-management" advertise-socket-binding="modcluster" enable-http2="true" max-retries="3"/>
                <mod-cluster name="load-balancer2" management-socket-binding="mcmp-management" advertise-socket-binding="modcluster" enable-http2="true" max-retries="3"/>
            </filters>

ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool -- 2) WFLYCTL0013: Operation ("add") failed - address: ([
    ("subsystem" => "undertow"),
    ("configuration" => "filter"),
    ("mod-cluster" => "load-balancer2")
]) - failure description: "WFLYCTL0436: Cannot register capability 'org.wildfly.undertow.mod_cluster-filter.filter' at location '[
    (\"subsystem\" => \"undertow\"),
    (\"configuration\" => \"filter\"),
    (\"mod-cluster\" => \"load-balancer2\")
]' as it is already registered in context 'global' at location(s) '[[
    (\"subsystem\" => \"undertow\"),
    (\"configuration\" => \"filter\"),
    (\"mod-cluster\" => \"load-balancer\")
]]'"