diff --git a/docs/en_US/release_notes_7_1.rst b/docs/en_US/release_notes_7_1.rst
index 0b9c45813..7271b1a3b 100644
--- a/docs/en_US/release_notes_7_1.rst
+++ b/docs/en_US/release_notes_7_1.rst
@@ -39,3 +39,4 @@ Bug fixes
   | `Issue #6130 <https://github.com/pgadmin-org/pgadmin4/issues/6130>`_ -  Ensure to quote the primary key value if needed while deleting rows from the table.
   | `Issue #6137 <https://github.com/pgadmin-org/pgadmin4/issues/6137>`_ -  Fixed error occurring while dumping the servers from CLI.
   | `Issue #6138 <https://github.com/pgadmin-org/pgadmin4/issues/6138>`_ -  Throw an appropriate error when a table for which View/Edit data is open, is deleted, and query is executed.
+  | `Issue #6159 <https://github.com/pgadmin-org/pgadmin4/issues/6159>`_ -  Ensure that the ERD tool should work with the external database after moving to psycopg3.
diff --git a/web/pgadmin/tools/erd/__init__.py b/web/pgadmin/tools/erd/__init__.py
index 425ce82da..a95896dc3 100644
--- a/web/pgadmin/tools/erd/__init__.py
+++ b/web/pgadmin/tools/erd/__init__.py
@@ -478,7 +478,7 @@ def panel(trans_id):
     if "linux" in _platform:
         is_linux_platform = True
 
-    s = Server.query.filter_by(id=params['sid']).first()
+    s = Server.query.filter_by(id=int(params['sid'])).first()
 
     params.update({
         'bgcolor': s.bgcolor,