diff --git a/gossamer_forums.rb b/gossamer_forums.rb
index a8b037a..7c35bb4 100644
--- a/gossamer_forums.rb
+++ b/gossamer_forums.rb
@@ -1,7 +1,7 @@
 # Federated Computer, Inc.
 # David Sainty <saint@federated.computer>  2024 A.D.
 # Gossamer Threads to Discourse -- Migration-Import Script
-# v0.39.1 Add SQLite table for tracking successful post importation; Split out user import into three separate callable methods; require sys/proctable
+# v0.39.2 Add SQLite table for tracking successful post importation; Split out user import into three separate callable methods; require sys/proctable
 
 require 'mysql2'
 require 'open-uri'
@@ -152,7 +152,7 @@ class GossamerForumsImporter < ImportScripts::Base
   end
 
   def insert_username_mapping(old_username, new_username, email, real_name)
-    @db.execute "INSERT INTO username_map (old_username, new_username, email, real_name) VALUES (?, ?, ?, ?)", old_username, new_username, email, real_name
+    @db.execute "INSERT OR REPLACE INTO username_map (old_username, new_username, email, real_name) VALUES (?, ?, ?, ?)", old_username, new_username, email, real_name
   end
 
   # Define a method to export the username mapping table to a CSV file