We are moving an old database to Jira where we had a control number that begins with PPH, so we created a new project in Jira and gave it the Key PPH. We added a text field in Jira to put the old control number in on imported issue like PPH-123, but Jira turns this into a link to the current project. We decided that this was confusing and changed the Jira Key to something else, but Jira still matches the text in a text field with a project Key that no longer exist.
Is there any way to update Jira that there isn't a PPH key project anymore?
