diff --git a/lib/assigner.rb b/lib/assigner.rb
index 65efca0..a034384 100644
--- a/lib/assigner.rb
+++ b/lib/assigner.rb
@@ -547,8 +547,7 @@ class ::Assigner
   end
 
   def reassign?
-    return false if !@target.is_a?(Topic)
-    Assignment.exists?(topic_id: @target.id, target: @target, active: true)
+    Assignment.exists?(target: @target, active: true)
   end
 
   def no_assignee_change?(assignee)
diff --git a/spec/lib/assigner_spec.rb b/spec/lib/assigner_spec.rb
index fb2b8f5..cb2db1e 100644
--- a/spec/lib/assigner_spec.rb
+++ b/spec/lib/assigner_spec.rb
@@ -264,6 +264,21 @@ RSpec.describe Assigner do
         expect(second_assign[:success]).to eq(true)
       end
 
+      it "reassigns a post even when at the assignments limit" do
+        posts =
+          (described_class::ASSIGNMENTS_PER_TOPIC_LIMIT).times.map do
+            Fabricate(:post, topic: topic)
+          end
+
+        posts.each do |post|
+          user = Fabricate(:moderator)
+          described_class.new(post, admin).assign(user)
+        end
+
+        status = described_class.new(posts.first, admin).assign(Fabricate(:moderator))
+        expect(status[:success]).to eq(true)
+      end
+
       context "when 'allow_self_reassign' is false" do
         subject(:assign) do
           assigner.assign(moderator, note: other_note, allow_self_reassign: self_reassign)