diff --git a/app/serializers/post_revision_serializer.rb b/app/serializers/post_revision_serializer.rb
index 5a6939dfa49..5c59e82d9b9 100644
--- a/app/serializers/post_revision_serializer.rb
+++ b/app/serializers/post_revision_serializer.rb
@@ -219,8 +219,13 @@ class PostRevisionSerializer < ApplicationSerializer
 
     # Retrieve any `tracked_topic_fields`
     PostRevisor.tracked_topic_fields.each_key do |field|
-      next if field == :tags
-      latest_modifications[field.to_s] = [topic.public_send(field)] if topic.respond_to?(field)
+      next unless topic.respond_to?(field)
+      topic
+        .public_send(field)
+        .then do |value|
+          next if value.try(:proxy_association)
+          latest_modifications[field.to_s] = [value]
+        end
     end
 
     latest_modifications["featured_link"] = [
diff --git a/spec/serializers/post_revision_serializer_spec.rb b/spec/serializers/post_revision_serializer_spec.rb
index bea000255f5..c70cf7f2a22 100644
--- a/spec/serializers/post_revision_serializer_spec.rb
+++ b/spec/serializers/post_revision_serializer_spec.rb
@@ -127,4 +127,20 @@ RSpec.describe PostRevisionSerializer do
       expect(json[:tags_changes]).to_not be_present
     end
   end
+
+  context "when some tracked topic fields are associations" do
+    let(:serializer) { described_class.new(post_revision, scope: guardian, root: false) }
+    let(:post_revision) { Fabricate(:post_revision, post:) }
+    let(:guardian) { Discourse.system_user.guardian }
+
+    before do
+      allow(PostRevisor).to receive(:tracked_topic_fields).and_wrap_original do |original_method|
+        original_method.call.merge(allowed_users: -> {}, allowed_groups: -> {})
+      end
+    end
+
+    it "skips them" do
+      expect { serializer.as_json }.not_to raise_error
+    end
+  end
 end