Export Mapping with all ersions on ODI 12c

Hi all,

We are trying to copy many mappings to another enviroment but this mappings have 2 or more versions.

When expert the mapping and after import the mapping in the target enviroment, but in the target enviroment only can se the mapping from the last version and in the Version section of the mapping any version is diplayed.

How can we export/import this mappings to keep all versions ?

Regards