Absence Types User Entity not available

Summary:

UE Name: "Absence Types User Entity"

Base Name: ANC_ABSENCE_TYPE_B_TL_JOINED_UE

Content (please ensure you mask any confidential information):

Need to add attribute "BASE_NAME" from UE 'Absence Types User Entity' but it is not getting showed up while selecting UE.

What could be reason?

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):