Issue with Expenditure Item Date for project information with supplier invoice

Summary:

We have supplier invoices which are booked with an invoice date which is within project start and end dates. However, the current date is past the project end date and it is giving a message the expenditure date is not valid.

Our current solution is to move out the project end date. However, this involves several people and delays the processing of supplier invoices. Does anyone else have a similar issue? Anything you do differently that is more efficient?