diff --git a/changes/621.fixed b/changes/621.fixed
new file mode 100644
index 00000000..51e48ff3
--- /dev/null
+++ b/changes/621.fixed
@@ -0,0 +1,2 @@
+Fixed ASN updates on Location objects.
+Fixed documentation on data normalization.
\ No newline at end of file
diff --git a/docs/user/integrations/bootstrap.md b/docs/user/integrations/bootstrap.md
index 94b89dad..8d881c00 100644
--- a/docs/user/integrations/bootstrap.md
+++ b/docs/user/integrations/bootstrap.md
@@ -19,6 +19,10 @@ NotYetImplemented
 
 ### Data structures
 
+### General Notes on Data in the YAML file
+
+Data values are generally normalized in the app code. If a value is supposed to be a string and you want it to be blank or none, include a blank string (`""`) in the value. Integers should be left completely blank. Lists should be set to an empty list (`[]`), and dictionaries should be set to a blank dictionary (`{}`) in the yaml file.
+
 #### global_settings.yml (see '../bootstrap/fixtures/global_settings.yml for examples of supported models)
 
 ```yaml
diff --git a/nautobot_ssot/integrations/bootstrap/diffsync/models/nautobot.py b/nautobot_ssot/integrations/bootstrap/diffsync/models/nautobot.py
index 76081a68..3b5de750 100755
--- a/nautobot_ssot/integrations/bootstrap/diffsync/models/nautobot.py
+++ b/nautobot_ssot/integrations/bootstrap/diffsync/models/nautobot.py
@@ -575,7 +575,7 @@ def update(self, attrs):
         if "facility" in attrs:
             _update_location.facility = attrs["facility"]
         if "asn" in attrs:
-            _update_location.asn = attrs["location"]
+            _update_location.asn = attrs["asn"]
         if "time_zone" in attrs:
             if attrs["time_zone"]:
                 _timezone = pytz.timezone(attrs["time_zone"])