1% mixing of gas and diesel--problems

here is a link ,to info, about mixing 1% of gas into diesel ,and 1% of diesel in to gas...... good day....rick .................................. ... .. . https://www.bellperformance.com/blog/accidentally-mixing-gasoline-and-diesel-fuel

It would have been nice if they would have had suggestions to deal with it.

The right thing to do is always the same. Drain the tank and filter, replace filter and refill prime and start. Anything 2009 and newer this is the way to go really. Some of the older engines could stand adding some lubricity and cetane additive and just running it through for minor mix-ups such as stated here.