update 4

run_image_captioning_flax_reduced.py

@@ -504,7 +504,9 @@ def main():
             "Decoder Config: Either a pretrained config or a model location for decoder is required."
         )
 
-    # GPT2 only has eos token but not pad token
+    # GPT2 only has bos/eos token but not decoder_start/pad token
+    if decoder_config.decoder_start_token_id is None:
+        decoder_config.decoder_start_token_id = decoder_config.bos_token_id
     if decoder_config.pad_token_id is None:
         decoder_config.pad_token_id = decoder_config.eos_token_id