Upsert of ->EAV or triplet with value nil fails

[Joel]

  (er/upsert {:eav/eid -1 :some-keyword nil})
  (er/upsert (clara-eav.eav/->EAV -1 :some-keyword nil))
  (er/upsert [-1 :some-keyword nil])
  
  Only one of these works.

[Joel]

(s/def ::v some?)

Should be "any?" I believe