1. If you simply want to rename a property (eg because it sold to someone else etc) or rename the same sub-block (eg you just don’t like the naming style) then you can go into Vineyards/(Properties) or SubBlocks and change the codes.

2. If you are physically change the subblocks in the property or vineyard, like replanting with a different clone or variety i.e. something that is materially changing the nature of that subblock so that previous data about it would not be comparable to future data: In this case you would want to archive the old sub-blocks and create new sub-block codes to represent them.

3. if you are simply rearranging your blocks eg splitting the same block into 2 distinct areas that perhaps ripen differently, then you might consider creating 2 new sub blocks as well then archiving the old one.