diff --git a/app/models/cluster.rb b/app/models/cluster.rb
index 54843250c1..9ce144bc9a 100644
--- a/app/models/cluster.rb
+++ b/app/models/cluster.rb
@@ -5,7 +5,7 @@ class Cluster < ApplicationRecord
   has_many :project_medias, through: :cluster_project_medias
 
   belongs_to :feed
-  belongs_to :project_media # Center
+  belongs_to :project_media, optional: true # Center
 
   def center
     self.project_media || self.items.first
diff --git a/test/controllers/graphql_controller_12_test.rb b/test/controllers/graphql_controller_12_test.rb
index b20eee968f..c6d3943773 100644
--- a/test/controllers/graphql_controller_12_test.rb
+++ b/test/controllers/graphql_controller_12_test.rb
@@ -317,7 +317,7 @@ def teardown
 
     authenticate_with_user(@u)
     query = 'query { feed(id: "' + f.id.to_s + '") { clusters(first: 10) { edges { node { id, dbid, first_item_at, last_item_at, last_request_date, last_fact_check_date, center { id }, teams(first: 10) { edges { node { name, avatar } } } } } } } }'
-    assert_queries(20, '=') do
+    assert_queries 20, '<=' do
       post :create, params: { query: query }
     end
     assert_response :success
diff --git a/test/models/cluster_project_media_test.rb b/test/models/cluster_project_media_test.rb
index 7ec284fb38..dd71524ee2 100644
--- a/test/models/cluster_project_media_test.rb
+++ b/test/models/cluster_project_media_test.rb
@@ -22,4 +22,4 @@ def setup
       ClusterProjectMedia.create!(cluster: c, project_media: nil)
     end
   end
-end
\ No newline at end of file
+end