Balance per segment &1 is not zero

What causes this issue?

Balance per segment &V1& is not zero.
The balance on segment &V1& is &V2& (transaction currency), &V3& (object
currency), and &V4& (controlling area currency).

System Response

With the standard settings, postings cannot be made to the document
because the balance for segment and partner segment does not amount to
zero. This may be due to a programming error, or this setting may have
been made (perhaps unintentionally) in the BAdIs for determining the
segment or partner segment.

How to fix this error?

If there is a programming error, please inform your system
administrator.
If this behavior is intentional, you can deactivate error message
FAGL_COFI 025 in Customizing or change the error message into a warning
message or an information message.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.