diff --git a/patches/external_pr/ui.py b/patches/external_pr/ui.py
index 1bdaebe..1264d26 100644
--- a/patches/external_pr/ui.py
+++ b/patches/external_pr/ui.py
@@ -39,7 +39,8 @@ def train_hypernetwork_ui(*args):
             shared.loaded_hypernetwork = initial_hypernetwork
         else:
             shared.loaded_hypernetworks = []
-        del hypernetwork
+        if 'hypernetwork' in locals():
+            del hypernetwork
         gc.collect()
         shared.sd_model.cond_stage_model.to(devices.device)
         shared.sd_model.first_stage_model.to(devices.device)