The importance of having a code of ethics as a record label owner is meant to guide you through the notion of demonstrating appropriate ethical conduct when working with artists, music producers, managers, and other stakeholders you are affiliated with in the music business.
And when we speak of "ethics" we are basically referring to a number of principles or perhaps we can say a wide range of convictions that are either perceived as being acceptable behavior or gross misconduct in the music industry.
Ideally, for a record label owner, you should always aim to carry yourself in respectable professional conduct. The supporting reason for this is, any behavior or action which falls in the lines of fraud, dishonesty, and deceit (i.e., finessing the artist) will have a terrible reflection on your character as a record executive.