Error when running the binding compiler more than once after adding "enum-value-method" to a value

After adding the enum-value-method to a value element in the binding file,
The first binding compilation succeeds and the marshalling / unmarshalling works fine.
once the binding compiler is run again, the following error appears:

[bind] Error running binding compiler
[bind] java.lang.ClassFormatError: Duplicate method name&signature in class file ....

The only way to resolve this is to either remove the enum-value-method, build, then add it back and build again.
or clean the entire project binaries and build it from scratch.

both are time consuming when working with a large project.