R12.1.3 : prerequisite conflict when applying Patch 16777853

Hi,

Readme for patch 16777853
=================

PATCH SEQUENCE:
  The following patches are required and should be applied to a test area
  first. You must download and install these patches unless they have been
  previously applied. Please apply in the order listed.

  Step  1: Apply Patch 7587155:R12.INV.B
  Step  2: Apply Patch 8486861:R12.GMA.B
  Step  3: Apply Patch 7627262:R12.INV.B
  Step  4: Apply Patch 9728811:R12.INV.B
  Step  5: Apply Patch 9877566:R12.INV.B
  Step  6: Apply Patch 11823085:R12.INV.B
  Step  7: Apply Patch 13020024:R12.INV.B
  Step  8: Apply Patch 13043283:R12.PO.B
  Step  9: Apply Patch 13334091:R12.GME.B
  Step 10: Apply Patch 16777853:R12.GMF.B
  Step 11: Apply Patch