I need to edit the context on a locked multi-select custom field

[Jim Smith]

I have a multi-select custom field, Affected Services, that shows locked in the Custom Field area of Admin.

This says that it's locked by Jira or a Plugin...I get the "locked by Jira" if it's a system field, but it's not.

How do I find out what is locking this field, how can I edit the context choices in the field?

I should also mention that this custom field was created for a Jira Service Management Project and is only used there.

[LukasG]

I just came across this old question - so here is an option in 2016:

Workflow Essentials for JIRA has this kind of functionality. You can define default values on create screens for many fields, per project and issue type or globally. 

[Андрей Зонин]

180$

[MinC]

There is a similar feature request has been raised here: https://jira.atlassian.com/browse/JRA-4812.

Which field that you wish to be configured with default values? Probably you can refer to this page: http://confluence.atlassian.com/display/JIRA/Setting+a+Default+Value+in+the+Description+Field if you want to set a default value in the 'Description' field.