diff --git a/db/migrate/20210425020131_create_missing_user_id_indexes.rb b/db/migrate/20210425020131_create_missing_user_id_indexes.rb
new file mode 100644
index 000000000..8da9af2eb
--- /dev/null
+++ b/db/migrate/20210425020131_create_missing_user_id_indexes.rb
@@ -0,0 +1,9 @@
+class CreateMissingUserIdIndexes < ActiveRecord::Migration[6.1]
+  def change
+    add_index :favorites, :user_id
+    add_index :favorites, :post_id
+    add_index :post_votes, :user_id
+    add_index :post_votes, :post_id
+    add_index :comments, :creator_id
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index abf39393e..d765b1e7f 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -3885,6 +3885,13 @@ CREATE INDEX index_comment_votes_on_user_id ON public.comment_votes USING btree
 CREATE INDEX index_comments_on_body_index ON public.comments USING gin (body_index);
 
 
+--
+-- Name: index_comments_on_creator_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_comments_on_creator_id ON public.comments USING btree (creator_id);
+
+
 --
 -- Name: index_comments_on_creator_id_and_post_id; Type: INDEX; Schema: public; Owner: -
 --
@@ -3976,6 +3983,20 @@ CREATE INDEX index_favorite_groups_on_creator_id ON public.favorite_groups USING
 CREATE INDEX index_favorite_groups_on_lower_name ON public.favorite_groups USING btree (lower(name));
 
 
+--
+-- Name: index_favorites_on_post_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_favorites_on_post_id ON public.favorites USING btree (post_id);
+
+
+--
+-- Name: index_favorites_on_user_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_favorites_on_user_id ON public.favorites USING btree (user_id);
+
+
 --
 -- Name: index_favorites_on_user_id_and_post_id; Type: INDEX; Schema: public; Owner: -
 --
@@ -4389,6 +4410,20 @@ CREATE INDEX index_post_versions_on_updater_id ON public.post_versions USING btr
 CREATE INDEX index_post_versions_on_updater_ip_addr ON public.post_versions USING btree (updater_ip_addr);
 
 
+--
+-- Name: index_post_votes_on_post_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_post_votes_on_post_id ON public.post_votes USING btree (post_id);
+
+
+--
+-- Name: index_post_votes_on_user_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_post_votes_on_user_id ON public.post_votes USING btree (user_id);
+
+
 --
 -- Name: index_post_votes_on_user_id_and_post_id; Type: INDEX; Schema: public; Owner: -
 --
@@ -5091,5 +5126,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20201220172926'),
 ('20201220190335'),
 ('20210117173030'),
-('20210405040522');
+('20210405040522'),
+('20210425020131');
+