fix: annotation has already assigned target

app.py

@@ -29,8 +29,8 @@ def predict(text):
 
     ner_pipeline(document)
 
-    for entity in document.entities.predictions:
-        document.entities.append(entity)
+    while len(document.entities.predictions) > 0:
+        document.entities.append(document.entities.predictions.pop())
 
     re_pipeline(document)