Hello Robin,
to make the interest rate adjustment condition editable again, you will have to reverse the posting of the interest flows as well as the interest adjustments.
To reverse these interest flows, go to ftr_edit -> cash flow tab. There is a button to change to
reverse mode - you can reverse single interest flows now from within the deal without reversing the whole deal.
Later, you can reverse the interest adjustments.
Concerning the principle increase: have you checked in tpm13, maybe it is already posted?
Best regards,
Marie