diff --git a/api/services/workflow_app_service.py b/api/services/workflow_app_service.py
index ced6dca324..23dd436675 100644
--- a/api/services/workflow_app_service.py
+++ b/api/services/workflow_app_service.py
@@ -86,12 +86,16 @@ class WorkflowAppService:
                 ),
             )
         if created_by_account:
+            account = session.scalar(select(Account).where(Account.email == created_by_account))
+            if not account:
+                raise ValueError(f"Account not found: {created_by_account}")
+
             stmt = stmt.join(
                 Account,
                 and_(
                     WorkflowAppLog.created_by == Account.id,
                     WorkflowAppLog.created_by_role == CreatorUserRole.ACCOUNT,
-                    Account.email == created_by_account,
+                    Account.id == account.id,
                 ),
             )
 
diff --git a/api/tests/test_containers_integration_tests/services/test_workflow_app_service.py b/api/tests/test_containers_integration_tests/services/test_workflow_app_service.py
index 62c9bead86..66bd4d3cd9 100644
--- a/api/tests/test_containers_integration_tests/services/test_workflow_app_service.py
+++ b/api/tests/test_containers_integration_tests/services/test_workflow_app_service.py
@@ -789,6 +789,31 @@ class TestWorkflowAppService:
         assert result_account_filter["total"] == 3
         assert all(log.created_by_role == CreatorUserRole.ACCOUNT for log in result_account_filter["data"])
 
+        # Test filtering by changed account email
+        original_email = account.email
+        new_email = "changed@example.com"
+        account.email = new_email
+        db_session_with_containers.commit()
+
+        assert account.email == new_email
+
+        # Results for new email, is expected to be the same as the original email
+        result_with_new_email = service.get_paginate_workflow_app_logs(
+            session=db_session_with_containers, app_model=app, created_by_account=new_email, page=1, limit=20
+        )
+        assert result_with_new_email["total"] == 3
+        assert all(log.created_by_role == CreatorUserRole.ACCOUNT for log in result_with_new_email["data"])
+
+        # Old email unbound, is unexpected input, should raise ValueError
+        with pytest.raises(ValueError) as exc_info:
+            service.get_paginate_workflow_app_logs(
+                session=db_session_with_containers, app_model=app, created_by_account=original_email, page=1, limit=20
+            )
+        assert "Account not found" in str(exc_info.value)
+
+        account.email = original_email
+        db_session_with_containers.commit()
+
         # Test filtering by non-existent session ID
         result_no_session = service.get_paginate_workflow_app_logs(
             session=db_session_with_containers,
@@ -799,15 +824,16 @@ class TestWorkflowAppService:
         )
         assert result_no_session["total"] == 0
 
-        # Test filtering by non-existent account email
-        result_no_account = service.get_paginate_workflow_app_logs(
-            session=db_session_with_containers,
-            app_model=app,
-            created_by_account="nonexistent@example.com",
-            page=1,
-            limit=20,
-        )
-        assert result_no_account["total"] == 0
+        # Test filtering by non-existent account email, is unexpected input, should raise ValueError
+        with pytest.raises(ValueError) as exc_info:
+            service.get_paginate_workflow_app_logs(
+                session=db_session_with_containers,
+                app_model=app,
+                created_by_account="nonexistent@example.com",
+                page=1,
+                limit=20,
+            )
+        assert "Account not found" in str(exc_info.value)
 
     def test_get_paginate_workflow_app_logs_with_uuid_keyword_search(
         self, db_session_with_containers, mock_external_service_dependencies
@@ -1057,15 +1083,15 @@ class TestWorkflowAppService:
         assert len(result_no_session["data"]) == 0
 
         # Test with account email that doesn't exist
-        result_no_account = service.get_paginate_workflow_app_logs(
-            session=db_session_with_containers,
-            app_model=app,
-            created_by_account="nonexistent@example.com",
-            page=1,
-            limit=20,
-        )
-        assert result_no_account["total"] == 0
-        assert len(result_no_account["data"]) == 0
+        with pytest.raises(ValueError) as exc_info:
+            service.get_paginate_workflow_app_logs(
+                session=db_session_with_containers,
+                app_model=app,
+                created_by_account="nonexistent@example.com",
+                page=1,
+                limit=20,
+            )
+        assert "Account not found" in str(exc_info.value)
 
     def test_get_paginate_workflow_app_logs_with_complex_query_combinations(
         self, db_session_with_containers, mock_external_service_dependencies