1. Go to Maintenance | General | Oracle apps connect and make sure list of dbs on the migration path is active here. If the environment is no longer active or should be remove, then proceed to step 2.
2. Go to Maintenance | Domain Specific | Oracle application migration path. Locate the migration path. Delete the old ebusiness dbs that has been deactivated. Add new dbs to the migration path.
3. Create new csr for changes to take effect.