Error when trying to test a sd 2.0 model

[gta4955]

hello, everytime i want to test a new trained model i get this error:
Traceback (most recent call last): File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/webui.py", line 14, in <module> from modules import shared, devices, sd_samplers, upscaler, extensions, localization, ui_tempdir File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/sd_samplers.py", line 12, in <module> from modules import prompt_parser, devices, processing, images File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/processing.py", line 15, in <module> import modules.sd_hijack File "/content/gdrive/MyDrive/sd/stable-diffusion-webui/modules/sd_hijack.py", line 32, in <module> ldm.modules.attention.BasicTransformerBlock.ATTENTION_MODES["softmax-xformers"] = ldm.modules.attention.CrossAttention AttributeError: type object 'BasicTransformerBlock' has no attribute 'ATTENTION_MODES'
What should i do?

[TheLastBen]

remove the folder sd from your gdrive and do a clean run using this link https://colab.research.google.com/github/TheLastBen/fast-stable-diffusion/blob/main/fast-DreamBooth.ipynb or A1111 ; https://colab.research.google.com/github/TheLastBen/fast-stable-diffusion/blob/main/fast_stable_diffusion_AUTOMATIC1111.ipynb