diff --git a/app/validators/types_de_champ/condition_validator.rb b/app/validators/types_de_champ/condition_validator.rb
index 65e1e887ae1..86e23ff62d8 100644
--- a/app/validators/types_de_champ/condition_validator.rb
+++ b/app/validators/types_de_champ/condition_validator.rb
@@ -1,24 +1,34 @@
 class TypesDeChamp::ConditionValidator < ActiveModel::EachValidator
-  def validate_each(procedure, attribute, types_de_champ)
-    return if types_de_champ.empty?
+  # condition are valid when
+  #   tdc.condition.left is present in upper tdcs
+  #   in case of types_de_champ_private, we should include types_de_champ_publics too
+  def validate_each(procedure, collection, tdcs)
+    return if tdcs.empty?
 
-    tdcs = if attribute == :draft_types_de_champ_private
-      procedure.draft_revision.types_de_champ_for
-    else
-      procedure.draft_revision.types_de_champ_for(scope: :public)
-    end
-
-    tdcs.each_with_index do |tdc, i|
+    tdcs = tdcs_with_children(procedure, tdcs)
+    tdcs.each_with_index do |tdc, tdc_index|
       next unless tdc.condition?
 
-      errors = tdc.condition.errors(tdcs.take(i))
+      upper_tdcs = []
+      if collection == :draft_types_de_champ_private # in case of private tdc validation, we must include public tdcs
+        upper_tdcs += tdcs_with_children(procedure, procedure.draft_types_de_champ_public)
+      end
+      upper_tdcs += tdcs.take(tdc_index) # we take all upper_tdcs of current tdcs
+
+      errors = tdc.condition.errors(upper_tdcs)
       next if errors.blank?
 
       procedure.errors.add(
-        attribute,
-        procedure.errors.generate_message(attribute, :invalid_condition, { value: tdc.libelle }),
+        collection,
+        procedure.errors.generate_message(collection, :invalid_condition, { value: tdc.libelle }),
         type_de_champ: tdc
       )
     end
   end
+
+  # find children in repetitions
+  def tdcs_with_children(procedure, tdcs)
+    tdcs.to_a
+      .flat_map { _1.repetition? ? procedure.draft_revision.children_of(_1) : _1 }
+  end
 end
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index 0fa94a425d1..0b8b3f4ed10 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -441,6 +441,33 @@
         end
       end
 
+      context 'when condition on champ private use public champ having a position higher than the champ private' do
+        include Logic
+
+        let(:types_de_champ_public) do
+          [
+            { type: :decimal_number, stable_id: 1 },
+            { type: :decimal_number, stable_id: 2 }
+          ]
+        end
+
+        let(:types_de_champ_private) do
+          [
+            { type: :text, condition: ds_eq(champ_value(2), constant(2)), stable_id: 3 }
+          ]
+        end
+
+        it 'validate without context' do
+          procedure.validate
+          expect(procedure.errors.full_messages_for(:draft_types_de_champ_private)).to be_empty
+        end
+
+        it 'validate allows condition' do
+          procedure.validate(:types_de_champ_private_editor)
+          expect(procedure.errors.full_messages_for(:draft_types_de_champ_private)).to be_empty
+        end
+      end
+
       context 'when condition on champ public use private champ' do
         include Logic
         let(:types_de_champ_public) { [{ type: :text, libelle: 'condition', condition: ds_eq(champ_value(1), constant(2)), stable_id: 2 }] }