Please complete the number of the group asset

What causes this issue?

The number of the group asset always consists of a main number as well
as a sub-number. It is absolutley necessary to enter the main number.
If you do not enter a sub-number the program supplies the number
'0000'.

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?

Correct your entry.

Error message extract from SAP system. Copyright SAP SE.