How to revert the migration of the repository?

Hi,

We created objects(DF,BE,BV) in our repository 1 and migrated them to repository 2 through import wizard. We made some changes to the same objects in the Repository 2 and migrated them back to Repository 1.

Our Observation:

1. All the new objects created in Repository 2 are working fine in Repository 1.

2. And the objects which are modified in Repository 2 (ex: DF) are throwing an error "IDispatch error #28176" when we open the DF. It is already 1 month from the time migration is done.

Please advise how to get over this error. Is there any possibility to revert the migration to the earlier stage?

Our Requirement:

1. We want the Repository 1 to have the earlier snap shot/instance which we had before the migration done from Repository 2 to Repository 1.

Thanks.