What are invalid SYS_PLSQL_%s_%c_%v type objects and how to correct.

Originally posted by User43019 (but as a document)

Hello,

There are numerous "SYS_PLSQL_{number}_{number}_{number}" invalid TYPE entries in the ALL_OBJECTS.  I cannot determine the origin of the system invalid TYPE's nor any corrective actions.  The most I could find were some references to SYS_PLSQL_%s_%c_%v objects where %v is the version.  Still nothing on what can be done to correct or eliminate these items.  Does anyone have information on SYS_PLSQL_ invalid TYPE objects and any corrective actio

Thanks