Reverting migration until empty clusterization center issue is actual…

…ly resolved (#1990)

Reference: CV2-4869

db/migrate/20240813155311_allow_empty_project_media_id_for_clusters.rb

@@ -0,0 +1,5 @@
+class AllowEmptyProjectMediaIdForClusters < ActiveRecord::Migration[6.1]
+  def change
+    change_column_null(:clusters, :project_media_id, true)
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2024_07_19_183518) do
+ActiveRecord::Schema.define(version: 2024_08_13_155311) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -235,7 +235,7 @@
   end
 
   create_table "clusters", force: :cascade do |t|
-    t.integer "project_media_id", null: false
+    t.integer "project_media_id"
     t.datetime "first_item_at"
     t.datetime "last_item_at"
     t.datetime "created_at", null: false