How to suppress version number suffix in document name

Related to my previous post, if I import the same nucleotide sequence or AB1 file twice. The last one gets a version number suffix attached to the name. This is unconsidered undesriable by the users, but I don't know how to suppress this behaviour. If have tried AnnotatedPluginDocument.setFieldValue(DocumentField.NAME_FIELD, "XXX"), plus saving the document again. But that didn't work.

192.168.2.1
192.168.0.1
192.168.1.128