diff --git a/code/go/internal/validator/spec.go b/code/go/internal/validator/spec.go
index e60d33810..19e38b9ed 100644
--- a/code/go/internal/validator/spec.go
+++ b/code/go/internal/validator/spec.go
@@ -72,8 +72,7 @@ func (s Spec) ValidatePackage(pkg Package) ve.ValidationErrors {
 		semantic.ValidatePrerelease,
 		semantic.ValidateFieldGroups,
 		semantic.ValidateFieldsLimits(rootSpec.Limits.FieldsPerDataStreamLimit),
-		// Temporarily disabled: https://github.com/elastic/package-spec/issues/331
-		//semantic.ValidateUniqueFields,
+		semantic.ValidateUniqueFields,
 		semantic.ValidateDimensionFields,
 		semantic.ValidateRequiredFields,
 	}
diff --git a/code/go/pkg/validator/validator_test.go b/code/go/pkg/validator/validator_test.go
index 18fe0a426..b7f910e99 100644
--- a/code/go/pkg/validator/validator_test.go
+++ b/code/go/pkg/validator/validator_test.go
@@ -277,7 +277,6 @@ func TestValidateVersionIntegrity(t *testing.T) {
 }
 
 func TestValidateDuplicatedFields(t *testing.T) {
-	t.Skip("Validation temporarily disabled: https://github.com/elastic/package-spec/issues/331")
 	tests := map[string]string{
 		"bad_duplicated_fields": "field \"event.dataset\" is defined multiple times for data stream \"wrong\", found in: ../../../../test/packages/bad_duplicated_fields/data_stream/wrong/fields/base-fields.yml, ../../../../test/packages/bad_duplicated_fields/data_stream/wrong/fields/ecs.yml",
 	}
diff --git a/versions/1/changelog.yml b/versions/1/changelog.yml
index b67e44e94..ad6edd443 100644
--- a/versions/1/changelog.yml
+++ b/versions/1/changelog.yml
@@ -4,9 +4,9 @@
 ##
 - version: 1.11.1-next
   changes:
-    - description: Prepare for next patch release
-      type: enhancement
-      link: https://github.com/elastic/package-spec/pull/353
+  - description: Enable validation of duplicated fields.
+    type: enhancement
+    link: https://github.com/elastic/package-spec/pull/338
 - version: 1.11.0
   changes:
     - description: Enable development resources for input packages