I've got mapping within my indexed entity with looks like this:
I was using faceting on tag Ids in version 5.0.1.Final. There is nothing indexed in Tag entity except for it's Id. After switching to version 5.3.0.Final I added @Facet(forField = "tags.id") to mapping. However I keep getting this HSEARCH000268 error saying that "Facet request 'tagsFacetRequest' tries to facet on field 'tags.id' which either does not exists or is not configured for faceting".