Instruction letter confused please help

[shugo 0]

Hi guys

My fiancée 's I-601 waiver approved and I got instruction letter from consulate Mexico , the letter said that"if you already had an interview and more than one year has passed sines your initial interview you will need to renew your documents go to http//...update the information or Ds260 ,pint the confirmation letter follow instruction to select appointment ,

So here is the problem ,k1visa I filled Ds160 the instruction letter all talk about Ds260

So my fiancée did go to the Wb page but it does not show update only we can do just fill the form again ,

Then we select date for appointment the system show successfully scheduled your appointment .it is not allow him to pay interview fee show that we paid last year $265 USD but we paid was last time interview , what about this time ? The instruction letter said that we need to pay again , so confuse ,

What additional documents we should bring ? I am so worried . Please give me some advice

Thank you so much !

[OJIMENEZ915 1]

How long did your fiance have to wait to have his i601 waiver approved?