diff --git a/basic_machines/distributor.lua b/basic_machines/distributor.lua
index 339dd0a..b5ac378 100644
--- a/basic_machines/distributor.lua
+++ b/basic_machines/distributor.lua
@@ -357,7 +357,7 @@ local function on_receive_fields(pos, formname, fields, player)
 	end
 	local meta = M(pos)
 	local crd = CRD(pos)
-	local filter = minetest.deserialize(meta:get_string("filter"))
+	local filter = minetest.deserialize(meta:get_string("filter")) or {false,false,false,false}
 	if fields.filter1 ~= nil then
 		filter[1] = fields.filter1 == "true"
 	elseif fields.filter2 ~= nil then
@@ -385,7 +385,7 @@ end
 local function change_filter_settings(pos, slot, val)
 	local slots = {["red"] = 1, ["green"] = 2, ["blue"] = 3, ["yellow"] = 4}
 	local meta = M(pos)
-	local filter = minetest.deserialize(meta:get_string("filter"))
+	local filter = minetest.deserialize(meta:get_string("filter")) or {false,false,false,false}
 	local num = slots[slot] or 1
 	if num >= 1 and num <= 4 then
 		filter[num] = val == "on"
@@ -402,7 +402,7 @@ end
 -- techage command to read filter channel status (on/off)
 local function read_filter_settings(pos, slot)
 	local slots = {["red"] = 1, ["green"] = 2, ["blue"] = 3, ["yellow"] = 4}
-	local filter = minetest.deserialize(M(pos):get_string("filter"))
+	local filter = minetest.deserialize(M(pos):get_string("filter")) or {false,false,false,false}
 	return filter[slots[slot]] and "on" or "off"
 end
 
diff --git a/basic_machines/legacy_nodes.lua b/basic_machines/foreign_nodes.lua
similarity index 100%
rename from basic_machines/legacy_nodes.lua
rename to basic_machines/foreign_nodes.lua
diff --git a/basis/legacy.lua b/basis/legacy.lua
new file mode 100644
index 0000000..1578262
--- /dev/null
+++ b/basis/legacy.lua
@@ -0,0 +1,25 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019-2021 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+	
+	For the transition from v0.26 to v1.0
+
+]]--
+
+function techage.register_node_for_v1_transition(nodenames, on_node_load)
+	minetest.register_lbm({
+		label = "[TechAge] V1 transition",
+		name = nodenames[1].."transition",
+		nodenames = nodenames,
+		run_at_every_load = false,
+		action = function(pos, node)
+			on_node_load(pos, node)
+		end
+	})
+end
diff --git a/init.lua b/init.lua
index 34257bc..f9d85d9 100644
--- a/init.lua
+++ b/init.lua
@@ -89,6 +89,7 @@ dofile(MP.."/basis/recipe_lib.lua")
 dofile(MP.."/basis/formspec_update.lua")
 dofile(MP.."/basis/windturbine_lib.lua")
 dofile(MP.."/basis/laser_lib.lua")
+dofile(MP.."/basis/legacy.lua")
 
 -- Main doc
 dofile(MP.."/doc/manual_DE.lua")
@@ -154,7 +155,7 @@ dofile(MP.."/liquids/pipe_wall_entry.lua")
 dofile(MP.."/basic_machines/consumer.lua")  -- consumer base model
 dofile(MP.."/basic_machines/source.lua")
 dofile(MP.."/basic_machines/pusher.lua")
-dofile(MP.."/basic_machines/legacy_nodes.lua")
+dofile(MP.."/basic_machines/foreign_nodes.lua")
 dofile(MP.."/basic_machines/mods_support.lua")
 dofile(MP.."/basic_machines/grinder.lua")
 dofile(MP.."/basic_machines/distributor.lua")
diff --git a/lamps/lib.lua b/lamps/lib.lua
index 440c728..2d30149 100644
--- a/lamps/lib.lua
+++ b/lamps/lib.lua
@@ -177,5 +177,8 @@ function techage.register_lamp(basename, ndef_off, ndef_on)
 	minetest.register_node(basename.."_on", ndef_on)
 	
 	power.register_nodes({basename.."_off", basename.."_on"}, Cable, "con")
+	techage.register_node_for_v1_transition({basename.."_off", basename.."_on"}, function(pos, node)
+		power.update_network(pos, nil, Cable)
+	end)
 end
 
diff --git a/solar/inverter.lua b/solar/inverter.lua
index b6e7a86..8d91155 100644
--- a/solar/inverter.lua
+++ b/solar/inverter.lua
@@ -248,3 +248,7 @@ minetest.register_craft({
 		{'default:steel_ingot', "techage:baborium_ingot", 'default:steel_ingot'},
 	},
 })
+
+techage.register_node_for_v1_transition({"techage:ta4_solar_inverter"}, function(pos, node)
+	power.update_network(pos, nil, Solar)
+end)