v7: duplicate a confirmed bank statement: duplicated moves are generated

[Leonardo Pistone]

observed in v7:

- Install just the module 'account'.
- create a bank statement with a line.
- confirm it: it generates a move (ok)
- duplicate the statement: you get a new statement in draft (ok)
- new moves have been created, duplicating the existing ones. That is incorrect, moves should not be duplicated.

thanks!

[Bhavesh Odedra(BrowseInfo) (bhavesh-odedra)]

Hello Leonardo Pistone,

I checked your scenario and face the same issue.

for better understanding duplicate record, I have made patch for you, that will add string 'copy' after the reference.

Thanks.