diff --git a/backend/api/tasks/actions.py b/backend/api/tasks/actions.py
index 82001e1453..dbf04148d1 100644
--- a/backend/api/tasks/actions.py
+++ b/backend/api/tasks/actions.py
@@ -1,5 +1,5 @@
 from databases import Database
-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, Depends, Query, Request
 from fastapi.responses import JSONResponse
 from loguru import logger
 
@@ -1141,6 +1141,14 @@ async def post(
 async def post(
     request: Request,
     project_id: int,
+    username: str | None = Query(
+        None, description="Username to revert tasks for", example="test"
+    ),
+    action: str | None = Query(
+        None,
+        description="Action to revert tasks for. Can be BADIMAGERY or VALIDATED",
+        example="BADIMAGERY",
+    ),
     db: Database = Depends(get_db),
     user: AuthUserDTO = Depends(login_required),
 ):
@@ -1196,9 +1204,15 @@ async def post(
             description: Internal Server Error
     """
     try:
-        request_data = await request.json()
-        action = request_data.get("action", None)
-        username = request_data.get("username", None)
+        if not (username or action):
+            return JSONResponse(
+                content={
+                    "Error": "Unable to revert tasks",
+                    "SubCode": "InvalidData",
+                },
+                status_code=400,
+            )
+
         if username:
             user = await UserService.get_user_by_username(username, db)
         revert_dto = RevertUserTasksDTO(
diff --git a/backend/services/stats_service.py b/backend/services/stats_service.py
index b0c40066fb..be4bdad7ac 100644
--- a/backend/services/stats_service.py
+++ b/backend/services/stats_service.py
@@ -294,7 +294,7 @@ async def get_last_activity(
     ) -> ProjectLastActivityDTO:
         """Gets the last activity for a project's tasks"""
 
-        # First subquery: Fetch the latest action date per task, excluding comments
+        # Subquery: Fetch latest actions for each task, excluding comments
         subquery_latest_action = """
         SELECT DISTINCT ON (th.task_id)
             th.task_id,
@@ -306,49 +306,33 @@ async def get_last_activity(
         ORDER BY th.task_id, th.action_date DESC
         """
 
-        latest_actions = await db.fetch_all(
-            subquery_latest_action,
-            {"project_id": project_id, "comment_action": "COMMENT"},
-        )
-
-        # Mapping the latest actions by task_id
-        latest_actions_map = {item["task_id"]: item for item in latest_actions}
-
-        # Second subquery: Fetch the task statuses
-        query_task_statuses = """
+        # Main query: Join task statuses with latest actions and user details
+        query_task_statuses = f"""
         SELECT
-            t.id as task_id,
+            t.id AS task_id,
             t.task_status,
-            u.username,
-            la.action_date
+            la.action_date,
+            u.username AS action_by
         FROM tasks t
-        LEFT JOIN (
-            SELECT
-                th.task_id,
-                th.action_date,
-                th.user_id
-            FROM task_history th
-            WHERE th.project_id = :project_id
-            AND th.action != :comment_action
-            ORDER BY th.task_id, th.action_date DESC
-        ) la ON la.task_id = t.id
+        LEFT JOIN ({subquery_latest_action}) la ON la.task_id = t.id
         LEFT JOIN users u ON u.id = la.user_id
         WHERE t.project_id = :project_id
         ORDER BY t.id
         """
 
+        # Execute the query
         results = await db.fetch_all(
             query_task_statuses, {"project_id": project_id, "comment_action": "COMMENT"}
         )
 
-        # Creating DTO
+        # Create DTO
         dto = ProjectLastActivityDTO(activity=[])
         for row in results:
             task_status_dto = TaskStatusDTO(
                 task_id=row["task_id"],
                 task_status=TaskStatus(row["task_status"]).name,
                 action_date=row["action_date"],
-                action_by=row["username"],
+                action_by=row["action_by"],
             )
             dto.activity.append(task_status_dto)
 
diff --git a/backend/services/validator_service.py b/backend/services/validator_service.py
index 6aef2bf0a7..d97c1b047e 100644
--- a/backend/services/validator_service.py
+++ b/backend/services/validator_service.py
@@ -2,8 +2,8 @@
 import datetime
 
 from databases import Database
-from sqlalchemy import text
 from loguru import logger
+from sqlalchemy import text
 
 from backend.exceptions import NotFound
 from backend.models.dtos.mapping_dto import TaskDTOs
@@ -512,37 +512,6 @@ async def get_task_mapping_issues(task_to_unlock: dict):
             )
         )
 
-    # @staticmethod
-    # async def revert_user_tasks(revert_dto: RevertUserTasksDTO, db: Database):
-    #     """
-    #     Reverts tasks with supplied action to previous state by specific user
-    #     :raises ValidatorServiceError
-    #     """
-    #     if await ProjectAdminService.is_user_action_permitted_on_project(
-    #         revert_dto.action_by, revert_dto.project_id, db
-    #     ):
-    #         query = Task.query.filter(
-    #             Task.project_id == revert_dto.project_id,
-    #             Task.task_status == TaskStatus[revert_dto.action].value,
-    #         )
-    #         if TaskStatus[revert_dto.action].value == TaskStatus.BADIMAGERY.value:
-    #             query = query.filter(Task.mapped_by == revert_dto.user_id)
-    #         else:
-    #             query = query.filter(Task.validated_by == revert_dto.user_id)
-
-    #         tasks_to_revert = query.all()
-    #         for task in tasks_to_revert:
-    #             task = MappingService.undo_mapping(
-    #                 revert_dto.project_id,
-    #                 task.id,
-    #                 revert_dto.user_id,
-    #                 revert_dto.preferred_locale,
-    #             )
-    #     else:
-    #         raise ValidatorServiceError(
-    #             "UserActionNotPermitted- User not permitted to revert tasks"
-    #         )
-
     @staticmethod
     async def revert_user_tasks(revert_dto: RevertUserTasksDTO, db: Database):
         """
@@ -568,7 +537,6 @@ async def revert_user_tasks(revert_dto: RevertUserTasksDTO, db: Database):
             else:
                 query += " AND validated_by = :user_id"
                 values["user_id"] = revert_dto.user_id
-
             tasks_to_revert = await db.fetch_all(query=query, values=values)
             for task in tasks_to_revert:
                 await MappingService.undo_mapping(