Period blocking of table & is &, maximum 16 is supported

What causes this issue?

You have tried to use a sender or receiver table with a period blocking
of more than 16 in a rollup. This means that more than 16 periods +
carry-forward period are stored in each physical summary record.
For technical reasons, however, the standard rollup transaction is only
designed for a maximum of 16 periods.

System Response

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

How to fix this error?

Inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.