I resolved above mentioned error,
That's not unusual - a broken custom field may throw errors in places where it's read or referred to, not necessarily just when you are configuring add-ons or fields.
What type of field is it?
By "where is it coming from", I meant what add-on are you using to provide it, but I apologise for not making that clear at first.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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