[SICSR-16165] Payment Partner in balance is wrong if there are multiple UWYs in one worksheet  
Product Line: P&C
Component/s: Accounting Technical Worksheet
Affects Version/s: SICS 4.6 SSP17 TOA17
Fix Version/s: SICS 4.9.3 SICS 4.6 SSP17 TOA18
**Issue Links: ** duplicates SICSR-15902
Customer: Toa Reinsurance Company Limited Japan
External Issue ID: IMPL-1977