fix engine to deal with the latest chroma

document_qa/document_qa_engine.py

@@ -207,7 +207,9 @@ class DocumentQAEngine:
         else:
             hash = metadata[0]['hash']
 
-        self.embeddings_dict[hash] = Chroma.from_texts(texts, embedding=self.embedding_function, metadatas=metadata)
+        if hash not in self.embeddings_dict.keys():
+            self.embeddings_dict[hash] = Chroma.from_texts(texts, embedding=self.embedding_function, metadatas=metadata, collection_name=hash)
+
         self.embeddings_root_path = None
 
         return hash