Is the uuid of the table's column must be unique?

[victorlizonglin]

I have two reports and each of them includes a table. There have some columns are common in two tables, so I just copy the table of the first report to the second and then add some new columns to the table of the second report.

Then I realized that each column has a uuid, so maybe even for different reports, the same columns should have the different uuid.

Am I right? If so, it means I can't just copy the table to another report, because the uuid will be same. 

[victorlizonglin]

Can anyone let me know - should I change the uuid for each column? I have already written a code to give them uuids.

Thanks!

[victorlizonglin]

I still don't know if it must be unique, but I have given them the new uuid, which is very easy in java code.