YTD and YTD prior with filter

[erihsehc]

hi there,

I would like to compare YTD against last year YTD. I created 2 measures as below, however, when I selected the current year in slicer, the last year YTD become blank. How to solve this, thanks

sales = CALCULATE(SUM(Sheet1[amount]),DATESYTD(Sheet1[data]))

LY sales = CALCULATE([sales],SAMEPERIODLASTYEAR(Sheet1[data]))

Data model as below

data model

Best regards,

ER