Rate Increase

Rate Increase

Hello,

I am trying to increase my rates within the project section of Zoho Invoice. When I attempt to edit a project and change the rate I get an error saying:

Almost there, but…

 - The rate cannot be changed for the staffs who were invoiced.

Is there another area I should be using to increase my rates? Can I do this globally or do I have to do it on each project?

Thanks,

TekTough.