How To Fix VO201 - No longer possible to change unit

SAP Error Message - Details

• Message type: E = Error

• Message class: VO - W&S: Rough workload forecast + picking wave

• Message number: 201

• Message text: No longer possible to change unit

What causes this issue?

You want to change the weight or volume unit. However, this is no
longer possible since workload data already exists in the databases.

System Response

The input is not accepted.

How to fix this error?

Use the function 'F12=Cancel' to end maintenance.
Delete or archive the data, and again call up the maintenance of the
control data.
If no more actual data exists, you can change the units.

Error message extract from SAP system. Copyright SAP SE.