What is the ruling on filling out the form for reducing the usurious loan interest rate for one's parents?

It is forbidden to borrow with usury to buy a house, and whoever borrowed with usury is only required to return the principal amount. There is no harm in filling out the form if it is for the purpose of reducing debt or interest. However, if the purpose is to enter into another usurious transaction or to reschedule the debt with an increase in interest, then it is not permissible to assist in it, unless the failure to submit it would result in imprisonment, in which case it is permissible due to necessity.