diff --git a/db/migrate/20241113155952_remove_null_strings_from_measurement_units.rb b/db/migrate/20241113155952_remove_null_strings_from_measurement_units.rb
new file mode 100644
index 00000000..9b5e9195
--- /dev/null
+++ b/db/migrate/20241113155952_remove_null_strings_from_measurement_units.rb
@@ -0,0 +1,8 @@
+class RemoveNullStringsFromMeasurementUnits < ActiveRecord::Migration[6.1]
+  def up
+    execute "UPDATE measurements SET unit = NULL WHERE unit = 'NULL'"
+    execute "UPDATE sensors SET unit = NULL WHERE unit = 'NULL'"
+  end
+
+  def down; end
+end
diff --git a/db/schema.rb b/db/schema.rb
index cc624da1..435d9451 100644
--- a/db/schema.rb
+++ b/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_10_14_052837) do
+ActiveRecord::Schema.define(version: 2024_11_13_155952) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "adminpack"