Error occurred while deploying the Business Data Model

Can Anyone help me?
I made a change to the BDM and after i did, the thing it not want to deploy.
I also get the following error when i try to run the process:
The business data 'leaveApproval' with the class name 'com.company.LeaveApproval' is not managed by the current version of the BDM.

Any help will be appreciated

Thanks

Johann