Hi Mahi,
You cannot load the different versions of the same file ( with same id ). you can load all the versions only if all your versions have different id's.
ex: test.bpmn2 has 3 versions 1.0.1.1 and 1.2 where 1.0 version had the id as test1 , v1.1 as test1.1 and v1.2 as test1.2. then all the 3 id's can be loaded.
regards
Prashanth