How To Fix USMD2040 - UI element &1: UI element type "attachments" not possible for ent.type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD2 - Master Data: UI Modeling

• Message number: 040

• Message text: UI element &1: UI element type "attachments" not possible for ent.type &2

What causes this issue?

You want to create UI element &V1& with <LS>Attachments</> as the UI
element type. Entity type &V2& does not allow attachments since the
<DS:DE.USMD_HAS_ATTACHMENT>Attachments</> checkbox is not selected for
this entity type in the data model. You cannot create a UI element for
attachments for this entity type.

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?

Choose an entity type for which the <LS>Attachments</> checkbox is
selected, or select the <LS>Attachments</> checkbox for entity type &V2&
in the data model.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.