Here is SAP support's response:
This issue occurs due to a dependency of SAPK-71012INSTBCO.
1. The object AGSCC_OBJECTS_TT is part of SAPKITL713, It needs the
object AGSCC_OBJECTS_S.
2. The object AGSCC_OBJECTS_S is part of SAPK-71012INSTBCO, but
SAPK-71012INSTBCO is not part of the import queue.
For your current situation, please restore the system back to the
status before the support package update. And redo the SP update
again with ST-BCO SP12 in the import queue and the issue will not occur.
Hope this helps.
Thanks,
Digesh