Cannot reproduce Problem with custom user field

[Father Sebastiaan]

Greetings all, I keep getting this... I enter the ID Zoa and in field ID and it gives me this error.

The following error occurred:

Please enter an ID using only a-z, A-Z, 0-9, and _ characters.

 

[Jake Bunce]

What version?

"Zoa" works fine as a field_id when I test it.

 

[oleksii-syvokhin]

The following error occurred:

Please enter an ID using only a-z, A-Z, 0-9, and _ characters.

Set ID

issueadmin

get the error. Without spaces and without extra characters.

What ID need to specify?