Contacting u credit in April re rent increase

Hi I have had a letter from council stating rent changes in April it says I have to contact u credit in April to let them know but I’ve read that you must go on journal to state a change of circumstances it’s not a change of circumstances just rent increase will this trigger another assessment filling forms in again and medical I am in health group no commitments as such I am worried sick as I have mental and physical disabilities please any feedback will be very much appreciated thanks for reading 👍🏻

There is a note on the UC system saying you cannot report a change, with regard to the April rent increases, until it actually happens.

I ignored this, and put in a journal entry stating the change of rent, the amounts, and the dates.
*I did this to make sure there is written evidence on their systems in case of any issues*
I also did this with regard to my pension which also goes up in April.

To access the journal I ticked the 'appointment' box.
It wouldn't let me do it otherwise.
They will no doubt request full info in April, but I wanted to cover my bases.