Substitution of endo lags >=2

Respectable Professors:
Hello!
As you can see from those words in red frame of the picture below, the question is what those words mean? Furthermore, will that influence the model solution by dynare? If that really matters a lot , then I’ll double check my model.

It simply means that you have a variable dated (-2) and Dynare internally handles that with an auxiliary variable.

Many thanks.