Error message Exchange rate mandatory even though currency conversion is set

In sales invoice,im getting a message,Exchange rate mandatory even though i have set Currency exchange from INR to AED .Please see screen shots.

Error message disappears on clicking ok button but it persists every time new invoice is created

Which branch are you using? This is already fixed in develop branch.

Im using master branch .When will it be updated there ?

The fix has already been merged in master yesterday.