"A combinatorial universal $\star$-product" is incorrect

TL;DR

This paper identifies and explains an error in a previous work on the combinatorial universal $ ext{star}$-product, demonstrating that its main result is invalid due to this mistake.

Contribution

It provides a critical correction to prior research, clarifying the mistake and its impact on the original conclusions.

Findings

The original proof contains a fundamental error.

The main result of the original paper is invalid.

The correction clarifies the limitations of the previous work.

Abstract

A very short note, explaining the error in the original paper, which renders its central result incorrect.