Validation Failed: Versions of the contract for a system endpoint cannot be created. Create a custom endpoint and give its contract another name
The Error
The instructions for Installing Velixo for MYOB Advanced note that:
There are a series of inquiries, necessary for supporting Velixo functionality, that must be installed within your ERP. The recommended method of doing this (and method required by Acumatica 2024 R1 and higher) is to install the Acumatica Customization Project.
You may get the following error when trying to publish the Velixo customisation package - you will see references to the validation failed because the endpoints cannot be deleted.
The Solution
Install the customisation to remove the endpoints and re-attempt the installation by following these steps.
Related Articles
Installing the Customisation Package for Acumatica-based ERPs