When we create the relationship "edit" between two recordings, some of other relationships of one of recordings should be automatically transferred to another, such as:

• Area: recorded in
• Artist: performance
• Event: recorded at
• Place: arranged at, recorded at
• Work: recording of (except attributes "partial" and "medley" which can be different).

All these relationships are evidently same for both recordings (original one and its edit). So there is no sense (and painful) to duplicate each of them manually from one recording to another.