diff --git a/census_of_population/process_2021.ipynb b/census_of_population/process_2021.ipynb
index b4489d6..28f77ee 100644
--- a/census_of_population/process_2021.ipynb
+++ b/census_of_population/process_2021.ipynb
@@ -118866,7 +118866,7 @@
    "source": [
     "## 4.0 Process Population centres (POPCTRs)\n",
     "### There are 1026 DGUIDs in the Census of Population data, but there should be 1030\n",
-    "They also use the pop_ctr_dguid and not the pop_ctr_p_dguid. So, there's no way to differentiate between Ottawa, and Gatineau for pop_ctr_dguid 2021S05100616"
+    "- They also use the pop_ctr_dguid and not the pop_ctr_p_dguid. So, there's no way to differentiate between Ottawa, and Gatineau for pop_ctr_dguid 2021S05100616"
    ]
   },
   {
@@ -118909,7 +118909,7 @@
     "DROP TABLE IF EXISTS er_2021;\n",
     "\n",
     "DROP TABLE IF EXISTS pop_ctr_2021;\n",
-    "CREATE TABLE pop_ctr_2021 AS SELECT pop_ctr_dguid AS dguid FROM 'https://data-01.dataforcanada.org/processed/statistics_canada/boundaries/2021/digital_boundary_files/pop_ctr_2021.parquet';\n",
+    "CREATE TABLE pop_ctr_2021 AS SELECT DISTINCT pop_ctr_dguid AS dguid FROM 'https://data-01.dataforcanada.org/processed/statistics_canada/boundaries/2021/digital_boundary_files/pop_ctr_2021.parquet';\n",
     "\"\"\")\n",
     "con.commit()\n",
     "\n",