How, when filling out a table through a form, columns with pre-written formulas were not cleared?

Question

Google Sheets

People who filled out the form need to know the notice number. I wrote down the formula in the "Notice number" column, but when filling out the form, the values ​​in the columns that are not present in the forms are erased.

Answer 1

Transfer the data from the form sheet to another sheet, and work with it there.
=ARRAYFORMULA(Ответы!A:Z)
Or instead of the usual formula, use "bulk", for the entire column

=ARRAYFORMULA("Т."&SEQUENCE(СЧЁТЗ(B:B)-1;1;1)&"-21")