Find supernets, don't create them

app/models/network_range.rb

@@ -136,33 +136,6 @@ class NetworkRange < ApplicationRecord
                  .order("masklen(network) ASC")  # Least specific child first
   end
 
-  # Find or create an ancestor network at a specific prefix length
-  # For example, given 192.168.1.0/24 and prefix 16, returns 192.168.0.0/16
-  def find_or_create_ancestor_at_prefix(target_prefix)
-    return self if prefix_length <= target_prefix
-
-    # Use PostgreSQL's set_masklen to create the ancestor CIDR
-    result = self.class.connection.execute(
-      "SELECT set_masklen('#{network}'::inet, #{target_prefix})::text as ancestor_cidr"
-    ).first
-
-    return self unless result
-
-    ancestor_cidr = result["ancestor_cidr"]
-    return self if ancestor_cidr == cidr
-
-    # Find or create the ancestor network range
-    ancestor = NetworkRange.find_by(network: ancestor_cidr)
-
-    if ancestor.nil?
-      # Create a virtual ancestor (not persisted, just for reference)
-      # The caller can decide whether to persist it
-      ancestor = NetworkRange.new(network: ancestor_cidr, source: 'inherited')
-    end
-
-    ancestor
-  end
-
   # Find nearest parent with intelligence data
   def parent_with_intelligence
     # Find all parent ranges (networks that contain this network)