diff --git a/lib/pg_ha_migrations/safe_statements.rb b/lib/pg_ha_migrations/safe_statements.rb
index b13a1f7..23b20e6 100644
--- a/lib/pg_ha_migrations/safe_statements.rb
+++ b/lib/pg_ha_migrations/safe_statements.rb
@@ -199,8 +199,6 @@ def safe_add_concurrent_partitioned_index(
     return if if_not_exists && parent_index.valid?
 
     child_indexes = parent_table.partitions.map do |child_table|
-      raise PgHaMigrations::InvalidMigrationError, "Partitioned table #{parent_table.inspect} contains sub-partitions" if child_table.natively_partitioned?
-
       PgHaMigrations::Index.from_table_and_columns(child_table, columns)
     end
 
@@ -221,8 +219,14 @@ def safe_add_concurrent_partitioned_index(
     end
 
     child_indexes.each do |child_index|
-      # CREATE INDEX CONCURRENTLY ON child_table
-      safe_add_concurrent_index(
+      add_index_method = if child_index.table.natively_partitioned?
+        :safe_add_concurrent_partitioned_index
+      else
+        :safe_add_concurrent_index
+      end
+
+      send(
+        add_index_method,
         child_index.table.fully_qualified_name,
         columns,
         name: child_index.name,
diff --git a/spec/safe_statements_spec.rb b/spec/safe_statements_spec.rb
index 0dc06b8..ce3d9cb 100644
--- a/spec/safe_statements_spec.rb
+++ b/spec/safe_statements_spec.rb
@@ -1732,33 +1732,6 @@ def up
             end.to raise_error(PgHaMigrations::InvalidMigrationError, "Table \"foos3\" is not a partitioned table")
           end
 
-          it "raises error when sub-partitioning detected" do
-            create_range_partitioned_table(:foos3, migration_klass)
-            create_range_partitioned_table(:foos3_sub, migration_klass)
-
-            setup_migration = Class.new(migration_klass) do
-              def up
-                unsafe_execute(<<~SQL)
-                  ALTER TABLE foos3
-                  ATTACH PARTITION foos3_sub
-                  FOR VALUES FROM ('2020-01-01') TO ('2020-02-01')
-                SQL
-              end
-            end
-
-            setup_migration.suppress_messages { setup_migration.migrate(:up) }
-
-            test_migration = Class.new(migration_klass) do
-              def up
-                safe_add_concurrent_partitioned_index :foos3, :updated_at
-              end
-            end
-
-            expect do
-              test_migration.suppress_messages { test_migration.migrate(:up) }
-            end.to raise_error(PgHaMigrations::InvalidMigrationError, "Partitioned table \"foos3\" contains sub-partitions")
-          end
-
           it "raises error when index invalid" do
             create_range_partitioned_table(:foos3, migration_klass, with_partman: true)