controlnet on bk-sdm-v2-tiny

[coolKeen]

Hi, thanks for your great job!!!
I want to train controlnet using bk-sdm-v2-tiny. The controlnet training code if from https://github.com/huggingface/diffusers/tree/main/examples/controlnet. But When I run the cmd like below

I get the error " unknown mid_block_type : None" below
，Without mid_block， is there any way to make bk-sdm-v2-tiny support controlnet training?
Thanks in advance!