What happens when two smallrye incoming methods declared without broadcast

Chatty.java

import io.smallrye.mutiny.Multi;
import java.time.Duration;
import java.time.Instant;
import javax.enterprise.context.ApplicationScoped;
import org.eclipse.microprofile.reactive.messaging.Incoming;
import org.eclipse.microprofile.reactive.messaging.Outgoing;

@ApplicationScoped
public class Chatty {

    @Outgoing("ticks")
    //Uncomment the following to declare the interactions correctly
    //@Broadcast
    public Multi<String> ticker() {
        return Multi.createFrom().ticks().every(Duration.ofSeconds(1))
            .onItem().transform(tick -> Instant.now().toString());
    }

    @Incoming("ticks")
    public void handler1(String tick) {
        System.out.printf("handler1: %s%n", tick);
    }

    @Incoming("ticks")
    public void handler2(String tick) {
        System.out.printf("handler2: %s%n", tick);
    }
}

App fails to start with

	Suppressed: io.smallrye.reactive.messaging.wiring.TooManyDownstreamCandidatesException: 'PublisherMethod{method:'ticker', outgoing:'ticks'}' supports a single downstream consumer, but found 2: [SubscriberMethod{method:'handler1', incoming:'ticks'}, SubscriberMethod{method:'handler2', incoming:'ticks'}]. You may want to enable broadcast using '@Broadcast' on the method PublisherMethod{method:'ticker', outgoing:'ticks'}.
		at io.smallrye.reactive.messaging.wiring.Wiring$PublisherMediatorComponent.validate(Wiring.java:535)
		at io.smallrye.reactive.messaging.wiring.Graph.<init>(Graph.java:69)
		at io.smallrye.reactive.messaging.wiring.Wiring.resolve(Wiring.java:151)
		at io.smallrye.reactive.messaging.wiring.Wiring_ClientProxy.resolve(Wiring_ClientProxy.zig:166)
		at io.smallrye.reactive.messaging.extension.MediatorManager.start(MediatorManager.java:165)
		... 23 more