Quantity update is specified for asset &1

What causes this issue?

Quantity update was specified for asset &V1&. However, you did not
enter a quantity for the acquisition to be posted to asset &V1&.

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?

Check your entries. If it is not possible to enter a quantity during
the posting, then use master data maintenance to enter a quantity for
asset &V1&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.