Hi, @smj-php Thanks for reaching out. To clarify, are you trying to edit the Internal Name (used when making API calls) or the Label (shown in-app, for example)? Labels can be edited, but internal values cannot. This is not something we can get around.
I can provide an example of changing the Label if that is helpful.
Hi @Jaycee_Lewis . Thanks for the reply. My apologies I should have said; I am trying to rename a custom property. Not the label, but the propertyName from when it was created.