misc: don't create variables on get() (#41961)

hobo/environment/utils.py

@@ -74,12 +74,10 @@ class Zone:
 
 def get_variable(name):
     from .models import Variable
-    variable, created = Variable.objects.get_or_create(
-        name=name,
-        defaults={
-            'auto': True,
-            'value': settings.VARIABLE_SETTINGS_DEFAULTS.get(name) or ''
-        })
+    try:
+        variable = Variable.objects.get(name=name)
+    except Variable.DoesNotExist:
+        variable = Variable(name=name, auto=True)
     return variable