Vendor invoice uniqueness check

[ehuelsmann]

Version

1.11.14

What browsers are you seeing the problem on?

This problem isn't browser related

What happened?

While entering transactions for a vendor, I was able to enter and post the same invoice twice (without reversing one of them).

What should have happened?

The accounting system should help the user prevent duplicate entry; it should therefor check invoice numbers of transactions being entered and saved against other transactions of the same vendor (or entity?) for duplicates. Duplicates should not normally be accepted without prior postings being reversed. (Exceptions may apply?)