diff --git a/app/models/columns/champ_column.rb b/app/models/columns/champ_column.rb
index b4c3977b98e..c333af91667 100644
--- a/app/models/columns/champ_column.rb
+++ b/app/models/columns/champ_column.rb
@@ -70,7 +70,7 @@ def typed_value(champ)
     when :date
       parse_datetime(value)&.to_date
     when :enum
-      parse_enum(value)
+      value
     when :enums
       parse_enums(value)
     else
@@ -91,13 +91,13 @@ def cast_value(champ)
     when ['integer_number', 'text'], ['decimal_number', 'text'] # number to text
       value
     when ['drop_down_list', 'multiple_drop_down_list'] # single list can become multi
-      [parse_enum(value)].compact_blank
+      [value]
     when ['drop_down_list', 'text'] # single list can become text
-      parse_enum(value)
+      value
     when ['multiple_drop_down_list', 'drop_down_list'] # multi list can become single
-      parse_enums(value)&.first
+      parse_enums(value).first
     when ['multiple_drop_down_list', 'text'] # multi list can become text
-      parse_enums(value)&.join(', ')
+      parse_enums(value).join(', ')
     when ['date', 'datetime'] # date <=> datetime
       parse_datetime(value)&.to_datetime
     when ['datetime', 'date'] # may lose some data, but who cares ?
@@ -116,19 +116,7 @@ def parse_boolean(value)
     end
   end
 
-  def parse_enum(value)
-    return value if options_for_select.blank?
-    value if options_for_select.to_set(&:second).member?(value)
-  end
-
-  def parse_enums(value)
-    values = JSON.parse(value)
-    return values if options_for_select.blank?
-    options = options_for_select.to_set(&:second)
-    values.filter { options.member?(_1) }
-  rescue JSON::ParserError
-    nil
-  end
+  def parse_enums(value) = JSON.parse(value) rescue nil
 
   def parse_datetime(value) = Time.zone.parse(value) rescue nil
 end
diff --git a/app/models/types_de_champ/drop_down_list_type_de_champ.rb b/app/models/types_de_champ/drop_down_list_type_de_champ.rb
index eee0c03b854..4b905839739 100644
--- a/app/models/types_de_champ/drop_down_list_type_de_champ.rb
+++ b/app/models/types_de_champ/drop_down_list_type_de_champ.rb
@@ -1,17 +1,4 @@
 # frozen_string_literal: true
 
 class TypesDeChamp::DropDownListTypeDeChamp < TypesDeChamp::TypeDeChampBase
-  def champ_blank?(champ)
-    super || !champ_value_in_options?(champ)
-  end
-
-  private
-
-  def champ_value_in_options?(champ)
-    champ_with_other_value?(champ) || drop_down_options.include?(champ.value)
-  end
-
-  def champ_with_other_value?(champ)
-    drop_down_other? && champ.value_json&.fetch('other', false)
-  end
 end
diff --git a/app/models/types_de_champ/multiple_drop_down_list_type_de_champ.rb b/app/models/types_de_champ/multiple_drop_down_list_type_de_champ.rb
index bbca8ee5253..1be2be9d5a0 100644
--- a/app/models/types_de_champ/multiple_drop_down_list_type_de_champ.rb
+++ b/app/models/types_de_champ/multiple_drop_down_list_type_de_champ.rb
@@ -24,7 +24,7 @@ def selected_options(champ)
       [champ.value]
     else
       JSON.parse(champ.value)
-    end.filter { drop_down_options.include?(_1) }
+    end
   rescue JSON::ParserError
     []
   end
diff --git a/spec/models/columns/champ_column_spec.rb b/spec/models/columns/champ_column_spec.rb
index af5cec1fa44..5254dd96a65 100644
--- a/spec/models/columns/champ_column_spec.rb
+++ b/spec/models/columns/champ_column_spec.rb
@@ -121,14 +121,6 @@ def column(label) = procedure.find_column(label:)
           expect(column('multiple_drop_down_list').value(champ)).to eq(['val1'])
           expect(column('text').value(champ)).to eq('val1')
         end
-
-        context 'value not in options' do
-          let(:value) { 'toto' }
-
-          it do
-            expect(column('simple_drop_down_list').value(champ)).to eq(nil)
-          end
-        end
       end
 
       context 'from a multiple_drop_down_list' do
@@ -139,14 +131,6 @@ def column(label) = procedure.find_column(label:)
           expect(column('simple_drop_down_list').value(champ)).to eq('val1')
           expect(column('text').value(champ)).to eq('val1, val2')
         end
-
-        context 'value not in options' do
-          let(:value) { '["toto","val2"]' }
-
-          it do
-            expect(column('multiple_drop_down_list').value(champ)).to eq(['val2'])
-          end
-        end
       end
     end
   end
diff --git a/spec/models/concerns/dossier_rebase_concern_spec.rb b/spec/models/concerns/dossier_rebase_concern_spec.rb
index 851080b301a..1f54fa99709 100644
--- a/spec/models/concerns/dossier_rebase_concern_spec.rb
+++ b/spec/models/concerns/dossier_rebase_concern_spec.rb
@@ -449,7 +449,7 @@
           tdc_to_update.update(drop_down_options: ["option", "updated"])
         end
 
-        it { expect { subject }.to change { dossier.project_champs_public.first.to_s }.from('v1').to('') }
+        it { expect { subject }.not_to change { dossier.project_champs_public.first.to_s } }
       end
 
       context 'when a dropdown unused option is removed' do
@@ -495,7 +495,7 @@
           tdc_to_update.update(drop_down_options: ["option", "updated"])
         end
 
-        it { expect { subject }.to change { dossier.project_champs_public.first.to_s }.from('v1, option').to('option') }
+        it { expect { subject }.not_to change { dossier.project_champs_public.first.to_s } }
       end
 
       context 'when a dropdown unused option is removed' do