ESA UC q please

emzooplofd

I moved to UC 4 months ago 
I currently get 278 per fortnight ESA
AND 177 universal credit a month

The other day my universal credit was 490. I'm in the partially unfit(?) for work group.  The man says it was because my ESA was below 300 but it's been like that for 4 months until this month. Any idea what will happen next month and why has it changed? 

Ty

KxMx

This is a mistake which seems to be linked to the April benefits rise. 
Happen to me last year and someone else I advised recently. 
You need to add a note on your Journal stating you have been overpaid UC due to an incorrect ESA deduction.
Once they've looked, a letter will be added to your Journal stating the amount overpaid and repayment instructions.