diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_api_blueprint.py b/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_api_blueprint.py
index fdc172e9a..4a894ba66 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_api_blueprint.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_api_blueprint.py
@@ -922,7 +922,7 @@ def process_instance_list(
         )
 
     process_instances = (
-        process_instance_query.distinct()
+        process_instance_query.group_by(ProcessInstanceModel.id)
         .order_by(
             ProcessInstanceModel.start_in_seconds.desc(), ProcessInstanceModel.id.desc()  # type: ignore
         )