diff --git a/app/models/project.rb b/app/models/project.rb
index f8bdd56b03ae..4ecfb916bf09 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -122,6 +122,7 @@ def validation_context
       @validation_context
     end
   end
+
   acts_as_searchable columns: %W(#{table_name}.name #{table_name}.identifier #{table_name}.description),
                      date_column: "#{table_name}.created_at",
                      project_key: "id",
diff --git a/spec/features/projects/life_cycle/overview_page/dialog/update_spec.rb b/spec/features/projects/life_cycle/overview_page/dialog/update_spec.rb
index 32f433111b29..d0883a150b48 100644
--- a/spec/features/projects/life_cycle/overview_page/dialog/update_spec.rb
+++ b/spec/features/projects/life_cycle/overview_page/dialog/update_spec.rb
@@ -155,5 +155,24 @@
         dialog.expect_closed
       end
     end
+
+    context "when there is an invalid custom field on the project (Regression#60666)" do
+      let(:custom_field) { create(:string_project_custom_field, is_required: true, is_for_all: true) }
+
+      before do
+        project.custom_field_values = { custom_field.id => nil }
+        project.save(validate: false)
+      end
+
+      it "allows saving and closing the dialog without the custom field validation to interfere" do
+        dialog = overview_page.open_edit_dialog_for_life_cycles
+
+        expect_angular_frontend_initialized
+
+        # Saving the dialog is successful
+        dialog.submit
+        dialog.expect_closed
+      end
+    end
   end
 end
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index 2d3ab1fe2f1b..10d513bd1721 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -455,6 +455,38 @@
   it_behaves_like "acts_as_customizable included" do
     let(:model_instance) { project }
     let(:custom_field) { create(:string_project_custom_field) }
+
+    describe "valid?" do
+      let(:custom_field) { create(:string_project_custom_field, is_required: true) }
+
+      before do
+        model_instance.custom_field_values = { custom_field.id => "test" }
+        model_instance.save
+        model_instance.custom_field_values = { custom_field.id => nil }
+      end
+
+      context "without a validation context" do
+        it "does not validates the custom fields" do
+          expect(model_instance).to be_valid
+        end
+
+        it "does not includes the default validation context in the validation_context" do
+          model_instance.send(:validation_context=, :custom_context)
+          expect(model_instance.validation_context).to eq(:custom_context)
+        end
+      end
+
+      context "with the :saving_custom_fields validation context" do
+        it "validates the custom fields" do
+          expect(model_instance).not_to be_valid(:saving_custom_fields)
+        end
+
+        it "includes the default validation context too in the validation_context" do
+          model_instance.send(:validation_context=, :saving_custom_fields)
+          expect(model_instance.validation_context).to eq(%i(saving_custom_fields update))
+        end
+      end
+    end
   end
 
   describe "url identifier" do
@@ -484,5 +516,30 @@
         expect(project.identifier).not_to eq(word)
       end
     end
+
+    # The acts_as_url plugin defines validation callbacks on :create and it is not automatically
+    # called when calling a custom context. However we need the acts_as_url callback to set the
+    # identifier when the validations are called with the :saving_custom_fields context.
+    context "when validating with :saving_custom_fields context" do
+      it "is set from name" do
+        project = described_class.new(name: "foo")
+
+        project.validate(:saving_custom_fields)
+
+        expect(project.identifier).to eq("foo")
+      end
+
+      it "is not allowed to clash with projects routing" do
+        expect(reserved).not_to be_empty
+
+        reserved.each do |word|
+          project = described_class.new(name: word)
+
+          project.validate(:saving_custom_fields)
+
+          expect(project.identifier).not_to eq(word)
+        end
+      end
+    end
   end
 end