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-rw-r--r--wqflask/wqflask/views.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/wqflask/wqflask/views.py b/wqflask/wqflask/views.py
index 86457c4e..8ac116be 100644
--- a/wqflask/wqflask/views.py
+++ b/wqflask/wqflask/views.py
@@ -703,7 +703,7 @@ def loading_page():
 
 @app.route("/run_mapping", methods=('POST','GET'))
 def mapping_results_page():
-    if request.method == "GET":
+    if request.method == "GET" and (hash_of_inputs := request.args.get("hash")):
         hash_of_inputs = request.args.get("hash")
         initial_start_vars = json.loads(Redis.get(hash_of_inputs))
         initial_start_vars['hash_of_inputs'] = hash_of_inputs