Script zxmigratefc.sql failed during R12 upgrade

 Hi Friends,

Script zxmigratefc.sql failed during R12 upgrade while applying merged patch 7303029 and 6678700. 

The exact error is....

ERROR at line 1:
ORA-00001: unique constraint (ZX.ZX_FC_CODES_DENORM_B_U1) violated
ORA-06512: at "APPS.ZX_FC_MIGRATE_PKG", line 4195
ORA-06512: at "APPS.ZX_FC_MIGRATE_PKG", line 5032
ORA-06512: at line 6

We figured out that the following patch needs to be applied to fix this issue. But, we need a direction "how to go ahead?"

For R12.0.x: Patch 8593634:R12.AP.A
For R12.1.x: Patch 8593634:R12.AP.B

The following are the concerns. Please direct us ASAP since we are failling behind the schedule.