Number Series Error Message in Business Central – What do I do?

How to resolve: “You cannot assign new numbers from the number series ___ .”

When trying to create a document (Sales Quote, Sales Order, Purchase Order, Invoice, etc…) if the system generates the following error, it is due to an issue with the Number Series setup.

The first thing to check is which number series the document is using so the required changes can be made.  In this case, we are trying to assign a number to a Sales Order. To find out which Number Series is being used on Sales Orders, navigate to “Sales & Receivables Setup.” If this issue was occurring on a Purchase Order, you would have to navigate to “Purchase & Payables Setup.”

Now that we know the number series that is being used for Sales Orders is “S-ORD-1,” we can resolve the error. Navigate to “No. Series” and find the Number Series “S-ORD-1.”

In the screenshot below, you can see that the last number used is the same as the ending number. To resolve the error, all we need to do is increase the ending number or leave the field blank.

Now we should be able to create a new Sales Order with no error message, as seen below!