Update modelling_multi.py

modelling_multi.py

@@ -245,6 +245,7 @@ class MultiCXREncoderDecoderModel(VisionEncoderDecoderModel):
 
         if not past_key_values:
             token_type_ids = self.token_ids_to_token_type_ids(input_ids, special_token_ids)
+            decoder_inputs['past_key_values']=None  # Because First time there will not be any past_key_values
         else:
             token_type_ids = self.token_ids_to_token_type_ids_past(input_ids, special_token_ids)