To convert lookup to the master-detail relationship you need to give parent record on all child records. This is because a master-detail relationship does not allow for 'orphaned' child records. Once you have a lookup with each child having a parent than you can go back and convert the lookup field to a master-detail.
To convert lookup to the master-detail relationship you need to give parent record on all child records. This is because a master-detail relationship does not allow for 'orphaned' child records. Once you have a lookup with each child having a parent than you can go back and convert the lookup field to a master-detail.
Hope it helps you.
Thanks
Varaprasad