diff --git a/lib/searchkick/index.rb b/lib/searchkick/index.rb
index 3ef078c..4e31bc3 100644
--- a/lib/searchkick/index.rb
+++ b/lib/searchkick/index.rb
@@ -199,20 +199,13 @@ module Searchkick
       refresh = options.fetch(:refresh, !scoped)
       options.delete(:refresh)
 
-      if method_name
+      if method_name || (scoped && !full)
         raise ArgumentError, "unsupported keywords: #{options.keys.map(&:inspect).join(", ")}" if options.any?
 
-        # update
+        # import only
         import_scope(relation, method_name: method_name, scope: scope)
         self.refresh if refresh
         true
-      elsif scoped && !full
-        raise ArgumentError, "unsupported keywords: #{options.keys.map(&:inspect).join(", ")}" if options.any?
-
-        # reindex association
-        import_scope(relation, scope: scope)
-        self.refresh if refresh
-        true
       else
         # full reindex
         reindex_scope(relation, scope: scope, **options)
--
libgit2 0.21.0