diff --git a/python/delete_tdr_rows.py b/python/delete_tdr_rows.py
index f008914..d49da13 100644
--- a/python/delete_tdr_rows.py
+++ b/python/delete_tdr_rows.py
@@ -39,7 +39,7 @@ def _fetch_file_ref_columns(self) -> list[str]:
         table_schema = self.tdr.get_table_schema_info(dataset_id=self.dataset_id, table_name=self.table_name)
         return [col['name'] for col in table_schema['columns'] if col['datatype'] == 'fileref']
 
-    def _log_rows_found_info(self, found_row_ids: list[str], file_uuids: list[str]) -> None:
+    def _log_rows_found_info(self, found_row_ids: list[str], file_uuids: set[str]) -> None:
         logging.info(f"Found {len(found_row_ids)} rows to delete")
         not_found_ids = set(self.ids_to_delete) - set(found_row_ids)
         if not_found_ids:
@@ -48,12 +48,12 @@ def _log_rows_found_info(self, found_row_ids: list[str], file_uuids: list[str])
             )
         logging.info(f"Found {len(file_uuids)} files linked to the rows to delete")
 
-    def run(self) -> tuple[list[str], list[str]]:
+    def run(self) -> tuple[list[str], set[str]]:
         table_metrics = tdr.get_dataset_table_metrics(dataset_id=dataset_id, target_table_name=table_name)
         # tdr_row_ids to be deleted
         tdr_row_ids = []
         # file uuids to be deleted later if options used
-        file_uuids = []
+        file_uuids = set()
         # Used to log the ids that were not found
         found_row_ids = []
 
@@ -67,7 +67,11 @@ def run(self) -> tuple[list[str], list[str]]:
                 tdr_row_id = row['datarepo_row_id']
                 # If the column is a fileref, store the file_uuid
                 if column in file_ref_columns:
-                    row_file_uuids.append(row[column])
+                    # If the column is a list, store all the file_uuids
+                    if isinstance(row[column], list):
+                        row_file_uuids.extend(row[column])
+                    else:
+                        row_file_uuids.append(row[column])
                 # If the column is the id column, check if the id is in the ids_to_delete_file
                 if column == self.id_column_name:
                     if row[column] in self.ids_to_delete:
@@ -75,7 +79,7 @@ def run(self) -> tuple[list[str], list[str]]:
                         store = True
             # If the row is to be deleted, store the file_uuids and tdr_row_id
             if store:
-                file_uuids.extend(row_file_uuids)
+                file_uuids.update(row_file_uuids)
                 tdr_row_ids.append(tdr_row_id)
         self._log_rows_found_info(found_row_ids, file_uuids)
         return tdr_row_ids, file_uuids
@@ -111,7 +115,7 @@ def run(self) -> tuple[list[str], list[str]]:
         if delete_files:
             if file_uuids:
                 tdr.delete_files(
-                    file_ids=file_uuids,
+                    file_ids=list(file_uuids),
                     dataset_id=dataset_id
                 )
             else:
diff --git a/wdl/DeleteTdrRows/README.md b/wdl/DeleteTdrRows/README.md
index 582d67c..4b11fb7 100644
--- a/wdl/DeleteTdrRows/README.md
+++ b/wdl/DeleteTdrRows/README.md
@@ -1,17 +1,19 @@
 # WDL Input Overview
 This WDl will delete rows from a table in a TDR. You can specify the table and the rows to delete. Optionally can delete files linked to the rows.
 
-If data / files being deleted are STILL part of active snapshot you will run into issues. Make sure to delete the snapshots first.
+## Notes
+* If data / files being deleted are STILL part of active snapshot you will run into issues. Make sure to delete the snapshots first.
+* This should kick off ONE workflow for all entities. Make sure you are selecting a SET containing all entities.
 
 ## Inputs Table:
-| Input Name               | Description                                                       | Type          | Required | Default                                                                                       |
-|--------------------------|-------------------------------------------------------------------|---------------|----------|-----------------------------------------------------------------------------------------------|
-| **dataset_id**           | dataset id where table exists                                     | String        | Yes      | N/A                                                                                           |
-| **tdr_table_name**       | Table name in dataset                                             | String        | Yes      | N/A                                                                                           |
-| **ids_to_delete**        | list of ids to look for and delete in table                       | Array[String] | Yes      | N/A                                                                                           |
-| **id_column_name**       | Name of column where ids exist                                    | String        | Yes      | N/A                                                                                           |
-| **delete_files**         | Use if want to delete files that are referenced in rows to delete | Boolean       | Yes      | N/A                                                                                           |
-| **docker**               | Specifies a custom Docker image to use. Optional.                 | String        | No       | "us-central1-docker.pkg.dev/operations-portal-427515/ops-toolbox/ops_terra_utils_slim:latest" |
+| Input Name               | Description                                                                    | Type          | Required | Default                                                                                       |
+|--------------------------|--------------------------------------------------------------------------------|---------------|----------|-----------------------------------------------------------------------------------------------|
+| **dataset_id**           | dataset id where table exists                                                  | String        | Yes      | N/A                                                                                           |
+| **tdr_table_name**       | Table name in dataset                                                          | String        | Yes      | N/A                                                                                           |
+| **ids_to_delete**        | list of ids to look for and delete in table. This should be selected as a set. | Array[String] | Yes      | N/A                                                                                           |
+| **id_column_name**       | Name of column where ids exist                                                 | String        | Yes      | N/A                                                                                           |
+| **delete_files**         | Use if want to delete files that are referenced in rows to delete              | Boolean       | Yes      | N/A                                                                                           |
+| **docker**               | Specifies a custom Docker image to use. Optional.                              | String        | No       | "us-central1-docker.pkg.dev/operations-portal-427515/ops-toolbox/ops_terra_utils_slim:latest" |
 
 
 ## Outputs Table: