How to mass update site assignment using FBDI

I need to clear "Use withholding Tax and Withholding Tax Group" fields,

I already used FBDI and was unable to update, we are on version 24C.

The Error: AWT_GROUP_ID or AWT_GROUP_NAME can't be provided if ALLOW_AWT_FLAG is N or null.

Has anyone seen this error, do you know if it is possible clean the fields using FBDI?

Thanks a lot.