Maximum number of items in FI reached - Message no. F5 727

If you hit the above erros when you create an invoice in SD, the corresponding accounting document is not created. 

The error is as follows: 

Maximum number of items in FI reached Message no. F5 727

Diagnosis  
The maximum number of items for an FI document ('999') has been exceeded. 

System response 
FI documents have a 3-digit item counter that limits the number of items permitted per document. 

Procedure  
If the documents with an excessive number of items come from another application area 
(e.g. sales, logistics, order accounting), you can configure the system to the effect that 
these documents are summarized in FI. " 

How could this error be solved as none of your invoices are getting accounted in FI?

To overcome this, the only way was to break the accounting invoices, 1 with 950 items and the other with the rest.