A MEMVAR or FIELD with the name '{0}' has already been defined.
This happens in code where a local statement, memvar statement or field statement redefines a name that has been defined before in the same entity, such as in the code below
FUNCTION DoSomething()
MEMVAR name
LOCAL name AS STRING // <-- Error 9075 here
or
FUNCTION DoSomething()
MEMVAR name
FIELD name IN CUSTOMER // <-- Error 9075 here