Update validation

app/models/location.rb

@@ -3,7 +3,7 @@ class Location < ApplicationRecord
   validate :validate_postcode, on: :postcode, if: proc { |model| model.postcode.presence }
   validates :location_admin_district, on: :location_admin_district, presence: { message: I18n.t("validations.location_admin_district") }
   validates :units, on: :units, presence: { message: I18n.t("validations.location.units.must_be_number") }
-  validates :units, numericality: { greater_than: 0, message: I18n.t("validations.location.units.must_be_one_or_more") }
+  validates :units, on: :units, numericality: { greater_than_or_equal_to: 1, message: I18n.t("validations.location.units.must_be_one_or_more") }
   validates :type_of_unit, on: :type_of_unit, presence: { message: I18n.t("validations.location.type_of_unit") }
   validates :mobility_type, on: :mobility_type, presence: { message: I18n.t("validations.location.mobility_standards") }
   validates :startdate, on: :startdate, presence: { message: I18n.t("validations.location.startdate_invalid") }