This is a Tuesday tapa puzzle, with a twist. EVERY number in each clue is wrong, and should actually be one more or less than written.
This is an actual Knapp Daneben, after yesterdays psuedo-knapp daneben. Hope that makes up for that.
I think this is the first puzzle I’ve made in a while with 8-way symmetry. (D4 group symmetry if you know what that means)
EDIT: Just a note that a 1 in a multi-digit cell can not become a 0.