COBCH1769 Nested Program-id name is not unique

The source code has two or more nested programs that have the same name.

Ensure each nested program has a unique program-id name.

Program-id ContainingProgram.
...
Program-id Nested1.
...
End Program Nested1.
Program-id Nested2.   *> rename one of these programs
...
End Program Nested2.
Program-id Nested2.   *> rename one of these programs
...
End Program Nested2.
End Program ContainingProgram.