Reading hardware counters from perf_event_uncore list with PAPI

I am trying to read one of the Hardware counters with PAPI. When I try to read events from perf_event list, it works fine. However now I need to read one of the counters from perf_event_uncore list, which is obtained with papi_native_avail, but I get an error. It's running on cascade lake architecture, with linux 5.4.0-3-amd64 version.

int err = PAPI_event_name_to_code("skx_unc_imc0::UNC_M_WPQ_CYCLES_FULL",&native);
if (err != PAPI_OK)
    printf("PAPI_event_name_to_code error: %d\n", err);

err = PAPI_add_event(EventSet, native);

if (err!= PAPI_OK)
      printf("PAPI_add_event error: %d\n", err);

Even though PAPI_event_name_to_code returns PAPI_OK, PAPI_add_event returns -1 which is PAPI_EINVAL - Invalid argument. I tried several counters form perf_event_uncore and I got the same problem. Do I need to use different function to add this even to the eventset? or is there something else that I am doing wrong?

I found something that seems to be a solution. After adding cpu=0 specification like this: PAPI_event_name_to_code("skx_unc_imc0::UNC_M_WPQ_CYCLES_FULL:cpu=0",&native) there is no furhter error while calling PAPI_add_event function.

Also to note, I have checked and this specific hardware counter can't be counted with others, so it should be the only event in the eventset.