Solved
Can I move an existing sales invoice to a customer and move it into new project
I see you can but it looses any of the Sales Items
Hi john.clissett,
If you edit the invoice to change the customer to the project on the 'Customer' drop-down this should not change or remove any other details on the invoice.
If this is causing details to change please try clearing the cache on your device following our guide - let us know if this does not resolve :)