Mandatory Exchange Rate on invoice

If we are using just one currency why is it mandatory for exchange rate to exist we have disabled all other currency and set global to USD:

this is really bad it is preventing me from completing an invoice when was this added?

You can customize it, try putting 1 in default and uncheck mandatory

BTW if your default currency is USD then it should appear

this has to be a bug because the logic does not follow:
If there is only one currency enabled in currency than exchange rate should not be activated.
If you go in to setup an exchange error comes up saying from and to currency can not be the same
this is a new issue as it only just appeared in last couple of updates

ok enabled and disabled a few other currencies and its now working must be something flakey between client creation and currency as we have not changed currency in forever but we have added customers…