diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58ebd4c75..1a5d79ebd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ### Fixes
 - Load CLI plug-ins in try..except block to avoid a failure in loading a plug-in to crash entire CLI ([#1392](https://github.com/neptune-ai/neptune-client/pull/1392))
+- Fixed cleaning operation storage when using sync mode and forking ([#1413](https://github.com/neptune-ai/neptune-client/pull/1413))
 
 
 ##  neptune 1.4.1
diff --git a/src/neptune/internal/operation_processors/sync_operation_processor.py b/src/neptune/internal/operation_processors/sync_operation_processor.py
index 4cfab5507..f97243818 100644
--- a/src/neptune/internal/operation_processors/sync_operation_processor.py
+++ b/src/neptune/internal/operation_processors/sync_operation_processor.py
@@ -15,6 +15,7 @@
 #
 __all__ = ("SyncOperationProcessor",)
 
+import os
 from datetime import datetime
 from pathlib import Path
 from typing import Optional
@@ -42,7 +43,7 @@ def __init__(self, container_id: UniqueId, container_type: ContainerType, backen
     def _init_data_path(container_id: UniqueId, container_type: ContainerType) -> Path:
         now = datetime.now()
         container_dir = f"{NEPTUNE_DATA_DIRECTORY}/{SYNC_DIRECTORY}/{container_type.create_dir_name(container_id)}"
-        data_path = f"{container_dir}/exec-{now.timestamp()}-{now.strftime('%Y-%m-%d_%H.%M.%S.%f')}"
+        data_path = f"{container_dir}/exec-{now.timestamp()}-{now.strftime('%Y-%m-%d_%H.%M.%S.%f')}-{os.getpid()}"
         return Path(data_path)
 
     def enqueue_operation(self, op: Operation, *, wait: bool) -> None:
@@ -66,3 +67,6 @@ def start(self):
 
     def stop(self, seconds: Optional[float] = None):
         self._operation_storage.close()
+
+    def close(self):
+        pass