How To Fix USMD1101 - Data model &1: Changes as compared to active version

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 101

• Message text: Data model &1: Changes as compared to active version

What causes this issue?

There is an active version of data model &V1&. This means that the data
model has already been activated, and database tables have been
generated for storing the master data. You can therefore only make
limited changed to the data model.
In the definition of data model &V1&, changes have been made (as
compared to the active version) that could lead to loss of data in the
generated database tables. The changes are described in detail in the f
ollowing system messages.

System Response

If there are error messages, the changes to the data model cannot be
saved for security reasons. If there are only warnings, the changes can
be saved.

How to fix this error?

Check if the changes to the data model can be made without loss of data.

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.