diff --git a/pycti/utils/opencti_stix2.py b/pycti/utils/opencti_stix2.py
index d46333420..7ae903dfe 100644
--- a/pycti/utils/opencti_stix2.py
+++ b/pycti/utils/opencti_stix2.py
@@ -29,8 +29,9 @@
 from pycti.utils.opencti_stix2_update import OpenCTIStix2Update
 from pycti.utils.opencti_stix2_utils import (
     OBSERVABLES_VALUE_INT,
+    STIX_CORE_OBJECTS,
     STIX_CYBER_OBSERVABLE_MAPPING,
-    STIX_OBJECTS,
+    STIX_META_OBJECTS,
 )
 
 datefinder.ValueError = ValueError, OverflowError
@@ -2542,9 +2543,17 @@ def organization_unshare(self, item):
 
     def element_operation_delete(self, item, operation):
         # If data is stix, just use the generic stix function for deletion
-        if item["type"] in STIX_OBJECTS:
-            force_delete = operation == "delete_force"
+        force_delete = operation == "delete_force"
+        if item["type"] == "relationship":
+            self.opencti.stix_core_relationship.delete(id=item["id"])
+        elif item["type"] == "sighting":
+            self.opencti.stix_sighting_relationship.delete(id=item["id"])
+        elif item["type"] in STIX_META_OBJECTS:
             self.opencti.stix.delete(id=item["id"], force_delete=force_delete)
+        elif item["type"] in list(STIX_CYBER_OBSERVABLE_MAPPING.keys()):
+            self.opencti.stix_cyber_observable.delete(id=item["id"])
+        elif item["type"] in STIX_CORE_OBJECTS:
+            self.opencti.stix_core_object.delete(id=item["id"])
         else:
             # Element is not knowledge we need to use the right api
             stix_helper = self.get_internal_helper().get(item["type"])
@@ -2552,7 +2561,7 @@ def element_operation_delete(self, item, operation):
                 stix_helper.delete(id=item["id"])
             else:
                 raise ValueError(
-                    "Delete operation or no stix helper", {"type": item["type"]}
+                    "Delete operation or not found stix helper", {"type": item["type"]}
                 )
 
     def apply_opencti_operation(self, item, operation):
diff --git a/pycti/utils/opencti_stix2_utils.py b/pycti/utils/opencti_stix2_utils.py
index 32e56e346..c45a5ea08 100644
--- a/pycti/utils/opencti_stix2_utils.py
+++ b/pycti/utils/opencti_stix2_utils.py
@@ -17,7 +17,13 @@
     "publicdashboard",
 ]
 
-SUPPORTED_STIX_ENTITY_OBJECTS = [
+STIX_META_OBJECTS = [
+    "label",
+    "vocabulary",
+    "kill-chain-phase",
+]
+
+STIX_CORE_OBJECTS = [
     "attack-pattern",
     "campaign",
     "case-incident",
@@ -42,8 +48,6 @@
     "indicator",
     "infrastructure",
     "intrusion-set",
-    "kill-chain-phase",
-    "label",
     "language",
     "location",
     "malware",
@@ -58,10 +62,11 @@
     "x-opencti-task",
     "threat-actor",
     "tool",
-    "vocabulary",
     "vulnerability",
 ]
 
+SUPPORTED_STIX_ENTITY_OBJECTS = STIX_META_OBJECTS + STIX_CORE_OBJECTS
+
 STIX_CYBER_OBSERVABLE_MAPPING = {
     "autonomous-system": "Autonomous-System",
     "directory": "Directory",