diff --git a/priv/repo/migrations/20251217151900_add_new_spec_columns_to_inst_vars.exs b/priv/repo/migrations/20251217151900_add_new_spec_columns_to_inst_vars.exs
new file mode 100644
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+++ b/priv/repo/migrations/20251217151900_add_new_spec_columns_to_inst_vars.exs
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# Zenflows is software that implements the Valueflows vocabulary.
+# Zenflows is designed, written, and maintained by srfsh <srfsh@dyne.org>
+# Copyright (C) 2021-2023 Dyne.org foundation <foundation@dyne.org>.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+defmodule Zenflows.DB.Repo.Migrations.Add_new_spec_columns_to_inst_vars do
+use Ecto.Migration
+
+alias Zenflows.VF.ResourceSpecification
+
+def up() do
+	# First, add the columns as nullable
+	alter table("zf_inst_vars") do
+		add :spec_dpp_id, references("vf_resource_specification")
+		add :spec_machine_id, references("vf_resource_specification")
+		add :spec_material_id, references("vf_resource_specification")
+	end
+
+	flush()
+
+	# Create the new ResourceSpecifications and update the inst_vars row
+	execute(fn ->
+		r = repo()
+
+		# Get the existing unit_one_id from the inst_vars row
+		[[unit_one_id]] = r.query!("SELECT unit_one_id FROM zf_inst_vars").rows
+
+		# Create the new resource specifications
+		spec_dpp = ResourceSpecification.Domain.create!(r, %{name: "DPP", default_unit_of_resource_id: unit_one_id})
+		spec_machine = ResourceSpecification.Domain.create!(r, %{name: "Machine", default_unit_of_resource_id: unit_one_id})
+		spec_material = ResourceSpecification.Domain.create!(r, %{name: "Material", default_unit_of_resource_id: unit_one_id})
+
+		# Update the inst_vars row with the new spec IDs
+		r.query!("UPDATE zf_inst_vars SET spec_dpp_id = $1, spec_machine_id = $2, spec_material_id = $3",
+			[spec_dpp.id, spec_machine.id, spec_material.id])
+	end)
+
+	flush()
+
+	# Now make the columns non-nullable
+	alter table("zf_inst_vars") do
+		modify :spec_dpp_id, references("vf_resource_specification"), null: false, from: references("vf_resource_specification")
+		modify :spec_machine_id, references("vf_resource_specification"), null: false, from: references("vf_resource_specification")
+		modify :spec_material_id, references("vf_resource_specification"), null: false, from: references("vf_resource_specification")
+	end
+end
+
+def down() do
+	alter table("zf_inst_vars") do
+		remove :spec_dpp_id
+		remove :spec_machine_id
+		remove :spec_material_id
+	end
+end
+end