JIRA "next gen" board user picker issue

[Robin Sarfati]

I can not use the next gen board, everytime I try to create an issue I receive the following message: 

Something's gone wrong

Product Owner: User 'admin' is not valid for this user picker

It seems It want to add a labeled role I have in another project rather than my actual user name. 

[Angélica Luz]

Hi Robin,

Can you please go to the custom fields and check if the field "Product owner" has a default value?
If so, please remove this value and try to open a ticket again.

Regards,
Angélica

[Robin Sarfati]

I am sorry but I don't see custom fields in next gen project settings

[Angélica Luz]

Hi Robin,

Sorry, I should have specified.
The custom fields are located on Jira Settings > Issues > Custom fields.
There you can check if the custom field has a default value by clicking on ... > Configure > Default value.

Regards,
Angélica

[Ben]

This sounds exactly the an issue I'm having!

We have no custom fields in the project in question, but the field at the front of our error did exist in a project we deleted recently.

@Robin Sarfati did you ever resolve the issue?