[Bug]: Adding a attribute ambigous

[alle-soptim]

Summary

Adding a attribute to a class results that the attribute is added four times.

Steps to reproduce

1. Load the attached schema in the TTL format
2. Select class "Anlage"
3. Add the attribute "name" as "xsd:string"

Expected behavior

A attribute "name" is added

Actual behavior

A attribute "name" is added four times

Impact

Blocks usage / critical

RDFArchitect version

missing

Environment

• Windows 11
• Firefox

Logs and screenshots