diff --git a/document_qa/document_qa_engine.py b/document_qa/document_qa_engine.py
index ac9eba2..2c6cf70 100644
--- a/document_qa/document_qa_engine.py
+++ b/document_qa/document_qa_engine.py
@@ -251,7 +251,8 @@ def create_memory_embeddings(self, pdf_path, doc_id=None, chunk_size=500, perc_o
         else:
             hash = metadata[0]['hash']
 
-        if hash not in self.embeddings_dict.keys():
+        if hash not in self.embeddings_dict.keys() and (
+                'documents' in self.embeddings_dict.get() and len(self.embeddings_dict.get()['documents']) == 0):
             self.embeddings_dict[hash] = Chroma.from_texts(texts,
                                                            embedding=self.embedding_function,
                                                            metadatas=metadata,