Why the same custom field has two different IDs? Edited

[Jorge P.]

Hi everyone: 

I have modified a custom field (applied in different projects) and now has two different custom field ID (for example: cf0001 and cf0002).

This has made my filters in dashboards to be deconfigured, as this custom field in the JQL query has taken the new ID value. 

Why can this have happened?

[Nic Brough _Adaptavist_ · Accepted solution]

One of your admins has created a new field with the same name as the existing one.  You'll probably want to rename it, check where it's been used and work out how to safely delete it.

[Jorge P.]

Isn't it possible the duplication of the ID when modifying the name of the custom field or one of the options?

[Nic Brough _Adaptavist_]

No, you cannot duplicate IDs.  Even the code can't do it, one of the few database functions Jira does use is to prevent duplicate IDs.

[Jorge P.]

Thank you very much.