Bing Ads - Can't Combine Month with Week(Sun-Sat)

Hi,

I wanted to change an existing Bing Ads query which reports on Year & Month with Year & Week (Mon-Sun) to Year & Month with Year & Week (Sun-Sat).

When i tried this i got the following error:

Query failed: Incompatible fields: Can't combine month and week in same query IllegalDimensionMetricCombinationException

It seems illogical that the query runs fine with Mon-Sun, but returns an error with Sun-Sat. Can this be fixed or can you explain why this is not possible?

~Twan