Number of items in document is too large

What causes this issue?

Say you want to post a document with &v1& line items in the interface
to financial accounting. The maximum number of line items allowed is
&v2&.

System Response

The document cannot be updated in financial accounting.

How to fix this error?

Subdivide your transaction (&v3&) in the calling application so that
the resulting document in financial accounting has less than &v2& line
items.

Error message extract from SAP system. Copyright SAP SE.