ar115app.sql erroring out with error "FNDFLEX-COMBINATION DISABLED" Exception : Flexbuilder error de

We are upgrading from 11.0.3 to 11.5.10.2. In this process, we are stuck up with the script ar115app.sql which is erroring out ....find below the log file of the same when run in debug mode.

Creating accounting for Receivable, Gain, Loss, Discount Accounts(+)

Calling AR_FLEXBUILDER_WF_PKG for APP: 485129
AR_FLEXBUILDER_WF_PKG x_arflexnum    : 50175
AR_FLEXBUILDER_WF_PKG x_arorigccid   : 296199
AR_FLEXBUILDER_WF_PKG x_arsubsticcid : 206988
Caching actual gain loss ccid : 203036

Calling AR_FLEXBUILDER_WF_PKG for APP: 484140
AR_FLEXBUILDER_WF_PKG x_arflexnum    : 50175
AR_FLEXBUILDER_WF_PKG x_arorigccid   : 216332
AR_FLEXBUILDER_WF_PKG x_arsubsticcid : 206996
Caching actual gain loss ccid : 216332