diff --git a/dhis-2/dhis-api/src/main/java/org/hisp/dhis/feedback/ErrorCode.java b/dhis-2/dhis-api/src/main/java/org/hisp/dhis/feedback/ErrorCode.java
index 23a0c14c9f10..1c1cf44d0afe 100644
--- a/dhis-2/dhis-api/src/main/java/org/hisp/dhis/feedback/ErrorCode.java
+++ b/dhis-2/dhis-api/src/main/java/org/hisp/dhis/feedback/ErrorCode.java
@@ -67,10 +67,7 @@ public enum ErrorCode {
   E1120("Update cannot be applied as it would make existing data values inaccessible"),
   E1121("Data element `{0}` value type cannot be changed as it has associated data values"),
 
-  E1122("Category option combo {0} already exists for category combo {1}"),
-  E1123("Category option combo {0} must be associated with a category combo"),
-  E1124("Category option combo {0} cannot be associated with the default category combo"),
-
+  E1122("Category option combo {0} cannot be associated with the default category combo"),
   E1125("Category option combo {0} contains options not associated with category combo {1}"),
   /* Org unit merge */
   E1500("At least two source orgs unit must be specified"),
diff --git a/dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/objectbundle/hooks/CategoryOptionComboObjectBundleHook.java b/dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/objectbundle/hooks/CategoryOptionComboObjectBundleHook.java
index ed95588fc917..8347f96b4e88 100644
--- a/dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/objectbundle/hooks/CategoryOptionComboObjectBundleHook.java
+++ b/dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/objectbundle/hooks/CategoryOptionComboObjectBundleHook.java
@@ -27,13 +27,9 @@
  */
 package org.hisp.dhis.dxf2.metadata.objectbundle.hooks;
 
-import java.util.List;
-import java.util.Set;
 import java.util.function.Consumer;
-import java.util.stream.Collectors;
 import lombok.AllArgsConstructor;
 import org.hisp.dhis.category.CategoryCombo;
-import org.hisp.dhis.category.CategoryOption;
 import org.hisp.dhis.category.CategoryOptionCombo;
 import org.hisp.dhis.category.CategoryService;
 import org.hisp.dhis.dxf2.metadata.objectbundle.ObjectBundle;
@@ -47,70 +43,6 @@ public class CategoryOptionComboObjectBundleHook
     extends AbstractObjectBundleHook<CategoryOptionCombo> {
   private final CategoryService categoryService;
 
-  static boolean haveEqualCatComboCatOptionReferenceIds(
-      CategoryOptionCombo one, CategoryOptionCombo other) {
-    if (one == null || other == null) {
-      return false;
-    }
-
-    if (one.getCategoryCombo() == null || other.getCategoryCombo() == null) {
-      return false;
-    }
-
-    if (one.getCategoryOptions() == null || other.getCategoryOptions() == null) {
-      return false;
-    }
-
-    if (!one.getCategoryCombo().getUid().equals(other.getCategoryCombo().getUid())) {
-      return false;
-    }
-
-    Set<String> oneCategoryOptionUids =
-        one.getCategoryOptions().stream().map(CategoryOption::getUid).collect(Collectors.toSet());
-
-    Set<String> otherCategoryOptionUids =
-        other.getCategoryOptions().stream().map(CategoryOption::getUid).collect(Collectors.toSet());
-
-    return oneCategoryOptionUids.equals(otherCategoryOptionUids);
-  }
-
-  private void checkDuplicateCategoryOptionCombos(
-      CategoryOptionCombo categoryOptionCombo,
-      ObjectBundle bundle,
-      Consumer<ErrorReport> addReports) {
-
-    if (bundle.isPersisted(categoryOptionCombo)) {
-      return; // Only check for duplicates if the object is not persisted
-    }
-
-    List<CategoryOptionCombo> categoryOptionCombos =
-        categoryService.getAllCategoryOptionCombos().stream()
-            .filter(
-                coc ->
-                    coc.getCategoryCombo()
-                        .getUid()
-                        .equals(categoryOptionCombo.getCategoryCombo().getUid()))
-            .toList();
-
-    // This could be an update or re-import of the same object.
-    if (categoryOptionCombos.stream()
-        .anyMatch(coc -> coc.getUid().equals(categoryOptionCombo.getUid()))) {
-      return;
-    }
-    // Check to see if the COC already exists in the list of COCs by comparing reference ids
-    for (CategoryOptionCombo existingCategoryOptionCombo : categoryOptionCombos) {
-      if (haveEqualCatComboCatOptionReferenceIds(categoryOptionCombo, existingCategoryOptionCombo)
-          && !categoryOptionCombo.getUid().equals(existingCategoryOptionCombo.getUid())) {
-        addReports.accept(
-            new ErrorReport(
-                CategoryOptionCombo.class,
-                ErrorCode.E1122,
-                categoryOptionCombo.getName(),
-                existingCategoryOptionCombo.getName()));
-      }
-    }
-  }
-
   private void checkNonStandardDefaultCatOptionCombo(
       CategoryOptionCombo categoryOptionCombo, Consumer<ErrorReport> addReports) {
 
@@ -125,7 +57,7 @@ private void checkNonStandardDefaultCatOptionCombo(
     if (!categoryOptionCombo.getUid().equals(defaultCatOptionCombo.getUid())) {
       addReports.accept(
           new ErrorReport(
-              CategoryOptionCombo.class, ErrorCode.E1124, categoryOptionCombo.getName()));
+              CategoryOptionCombo.class, ErrorCode.E1122, categoryOptionCombo.getName()));
     }
   }
 
@@ -136,6 +68,5 @@ public void validate(
       Consumer<ErrorReport> addReports) {
 
     checkNonStandardDefaultCatOptionCombo(categoryOptionCombo, addReports);
-    checkDuplicateCategoryOptionCombos(categoryOptionCombo, bundle, addReports);
   }
 }
diff --git a/dhis-2/dhis-test-web-api/src/test/java/org/hisp/dhis/webapi/controller/CategoryOptionComboControllerTest.java b/dhis-2/dhis-test-web-api/src/test/java/org/hisp/dhis/webapi/controller/CategoryOptionComboControllerTest.java
index 32c6fd53a882..0268fe8f443e 100644
--- a/dhis-2/dhis-test-web-api/src/test/java/org/hisp/dhis/webapi/controller/CategoryOptionComboControllerTest.java
+++ b/dhis-2/dhis-test-web-api/src/test/java/org/hisp/dhis/webapi/controller/CategoryOptionComboControllerTest.java
@@ -121,35 +121,6 @@ void catOptionCombosExcludingDefaultTest() {
         catOptionComboNames.contains("default"), "default catOptionCombo is not in payload");
   }
 
-  @Test
-  @DisplayName("Duplicate CategoryOptionCombos should not be allowed")
-  void catOptionCombosDuplicatedTest() {
-
-    JsonObject response =
-        GET("/categoryOptionCombos?filter=id:eq:CocUid0001&fields=id,categoryCombo[id],categoryOptions[id]")
-            .content();
-    JsonList<JsonCategoryOptionCombo> catOptionCombos =
-        response.getList("categoryOptionCombos", JsonCategoryOptionCombo.class);
-    String catOptionComboAOptions = catOptionCombos.get(0).getCategoryOptions().get(0).getId();
-    String catOptionComboACatComboId = catOptionCombos.get(0).getCategoryCombo().getId();
-
-    JsonErrorReport error =
-        POST(
-                "/categoryOptionCombos/",
-                """
-                { "name": "A_1",
-                "categoryOptions" : [{"id" : "%s"}],
-                "categoryCombo" : {"id" : "%s"} }
-                """
-                    .formatted(catOptionComboAOptions, catOptionComboACatComboId))
-            .content(HttpStatus.CONFLICT)
-            .find(JsonErrorReport.class, report -> report.getErrorCode() == ErrorCode.E1122);
-    assertNotNull(error);
-    assertEquals(
-        "Category option combo A_1 already exists for category combo CatOptCombo A",
-        error.getMessage());
-  }
-
   @Test
   @DisplayName("Duplicate default category option combos should not be allowed")
   void catOptionCombosDuplicatedDefaultTest() {
@@ -176,7 +147,7 @@ void catOptionCombosDuplicatedDefaultTest() {
         response.find(JsonErrorReport.class, report -> report.getErrorCode() == ErrorCode.E1122);
     assertNotNull(error);
     assertEquals(
-        "Category option combo Not default already exists for category combo default",
+        "Category option combo Not default cannot be associated with the default category combo",
         error.getMessage());
   }
 }