Updating column in table throws error

[Ashok Kumar]

 Hi gurus,
I have an ORC table bucketed on invoicenumber with "transactional"="true"
I am trying to update invoicenumber column used for bucketing this table but it 
comes back with
Error: Error while compiling statement: FAILED: SemanticException [Error 
10302]: Updating values of bucketing columns is not supported.  Column 
invoicenumber
Any ideas how it can be solved?
Thank you