diff --git a/apiserver/plane/api/views/cycle.py b/apiserver/plane/api/views/cycle.py
index c296bb111..7a9cfb1b5 100644
--- a/apiserver/plane/api/views/cycle.py
+++ b/apiserver/plane/api/views/cycle.py
@@ -243,6 +243,29 @@ class CycleAPIEndpoint(WebhookMixin, BaseAPIView):
         ):
             serializer = CycleSerializer(data=request.data)
             if serializer.is_valid():
+                if (
+                    request.data.get("external_id")
+                    and request.data.get("external_source")
+                    and Cycle.objects.filter(
+                        project_id=project_id,
+                        workspace__slug=slug,
+                        external_source=request.data.get("external_source"),
+                        external_id=request.data.get("external_id"),
+                    ).exists()
+                ):
+                    cycle = Cycle.objects.filter(
+                        workspace__slug=slug,
+                        project_id=project_id,
+                        external_source=request.data.get("external_source"),
+                        external_id=request.data.get("external_id"),
+                    ).first()
+                    return Response(
+                        {
+                            "error": "Cycle with the same external id and external source already exists",
+                            "cycle": str(cycle.id),
+                        },
+                        status=status.HTTP_409_CONFLICT,
+                    )
                 serializer.save(
                     project_id=project_id,
                     owned_by=request.user,
@@ -289,6 +312,23 @@ class CycleAPIEndpoint(WebhookMixin, BaseAPIView):
 
         serializer = CycleSerializer(cycle, data=request.data, partial=True)
         if serializer.is_valid():
+            if (
+                request.data.get("external_id")
+                and (cycle.external_id != request.data.get("external_id"))
+                and Cycle.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source", cycle.external_source),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                return Response(
+                    {
+                        "error": "Cycle with the same external id and external source already exists",
+                        "cycle_id": str(cycle.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
             serializer.save()
             return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
diff --git a/apiserver/plane/api/views/issue.py b/apiserver/plane/api/views/issue.py
index e91f2a5f6..530eef5bf 100644
--- a/apiserver/plane/api/views/issue.py
+++ b/apiserver/plane/api/views/issue.py
@@ -220,6 +220,30 @@ class IssueAPIEndpoint(WebhookMixin, BaseAPIView):
         )
 
         if serializer.is_valid():
+            if (
+                request.data.get("external_id")
+                and request.data.get("external_source")
+                and Issue.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source"),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                issue = Issue.objects.filter(
+                    workspace__slug=slug,
+                    project_id=project_id,
+                    external_id=request.data.get("external_id"),
+                    external_source=request.data.get("external_source"),
+                ).first()
+                return Response(
+                    {
+                        "error": "Issue with the same external id and external source already exists",
+                        "issue_id": str(issue.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
+
             serializer.save()
 
             # Track the issue
@@ -256,6 +280,24 @@ class IssueAPIEndpoint(WebhookMixin, BaseAPIView):
             partial=True,
         )
         if serializer.is_valid():
+            if (
+                str(request.data.get("external_id"))
+                and (issue.external_id != str(request.data.get("external_id")))
+                and Issue.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source", issue.external_source),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                return Response(
+                    {
+                        "error": "Issue with the same external id and external source already exists",
+                        "issue_id": str(issue.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
+
             serializer.save()
             issue_activity.delay(
                 type="issue.activity.updated",
@@ -263,6 +305,8 @@ class IssueAPIEndpoint(WebhookMixin, BaseAPIView):
                 actor_id=str(request.user.id),
                 issue_id=str(pk),
                 project_id=str(project_id),
+                external_id__isnull=False,
+                external_source__isnull=False,
                 current_instance=current_instance,
                 epoch=int(timezone.now().timestamp()),
             )
diff --git a/apiserver/plane/api/views/module.py b/apiserver/plane/api/views/module.py
index 1a9a21a3c..e2d59e126 100644
--- a/apiserver/plane/api/views/module.py
+++ b/apiserver/plane/api/views/module.py
@@ -132,6 +132,29 @@ class ModuleAPIEndpoint(WebhookMixin, BaseAPIView):
             },
         )
         if serializer.is_valid():
+            if (
+                request.data.get("external_id")
+                and request.data.get("external_source")
+                and Module.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source"),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                module = Module.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source"),
+                    external_id=request.data.get("external_id"),
+                ).first()
+                return Response(
+                    {
+                        "error": "Module with the same external id and external source already exists",
+                        "module_id": str(module.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
             serializer.save()
             module = Module.objects.get(pk=serializer.data["id"])
             serializer = ModuleSerializer(module)
@@ -149,8 +172,25 @@ class ModuleAPIEndpoint(WebhookMixin, BaseAPIView):
             partial=True,
         )
         if serializer.is_valid():
+            if (
+                request.data.get("external_id")
+                and (module.external_id != request.data.get("external_id"))
+                and Module.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source", module.external_source),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                return Response(
+                    {
+                        "error": "Module with the same external id and external source already exists",
+                        "module_id": str(module.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
             serializer.save()
-            return Response(serializer.data, status=status.HTTP_201_CREATED)
+            return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
     def get(self, request, slug, project_id, pk=None):
diff --git a/apiserver/plane/api/views/state.py b/apiserver/plane/api/views/state.py
index f931c2ed2..88fb083f0 100644
--- a/apiserver/plane/api/views/state.py
+++ b/apiserver/plane/api/views/state.py
@@ -38,6 +38,30 @@ class StateAPIEndpoint(BaseAPIView):
             data=request.data, context={"project_id": project_id}
         )
         if serializer.is_valid():
+            if (
+                request.data.get("external_id")
+                and request.data.get("external_source")
+                and State.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source"),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                state = State.objects.filter(
+                    workspace__slug=slug,
+                    project_id=project_id,
+                    external_id=request.data.get("external_id"),
+                    external_source=request.data.get("external_source"),
+                ).first()
+                return Response(
+                    {
+                        "error": "State with the same external id and external source already exists",
+                        "state_id": str(state.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
+
             serializer.save(project_id=project_id)
             return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
@@ -91,6 +115,23 @@ class StateAPIEndpoint(BaseAPIView):
         )
         serializer = StateSerializer(state, data=request.data, partial=True)
         if serializer.is_valid():
+            if (
+                str(request.data.get("external_id"))
+                and (state.external_id != str(request.data.get("external_id")))
+                and State.objects.filter(
+                    project_id=project_id,
+                    workspace__slug=slug,
+                    external_source=request.data.get("external_source", state.external_source),
+                    external_id=request.data.get("external_id"),
+                ).exists()
+            ):
+                return Response(
+                    {
+                        "error": "State with the same external id and external source already exists",
+                        "state_id": str(state.id),
+                    },
+                    status=status.HTTP_409_CONFLICT,
+                )
             serializer.save()
             return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)