How do sum up multiple items for the same field using cell references in GETPIVOTDATA

Dear Excel Experts

I want to sum up data for more than 2 fields from a pivot table using GETPIVOTDATA formula. When I linked it with one field it is giving correct result as show below

=SUM(IFERROR((GETPIVOTDATA("Sum of UT",$A$3,"Companies",$P7:$P$12,"Period",K$6,"Bank",$O$7,"Facilities","Current Account","F/N","FB")),))

But when I linked with more than one field it is not giving correct result

=SUM(IFERROR((GETPIVOTDATA("Sum of UT",$A$3,"Companies",$P$7:$P$12,"Period",K$6,"Bank",$O$7:$O$20,"Facilities","Current Account","F/N","FB")),))

I would be grateful if you can help me on the above issue. Thank you

thank you
Rahul