[rt-users] Custom Fields 'Could not add new custom field value. Permission Denied'

[Phanoko]

I keep getting "Could not add new custom field value.
Permission Denied" when attempting to update a field. 
I know that it's permissions but I've added so many
permissions it's crazy.  So far the only sure way to
be able to do it is to make the user a super user. 
What permissions are needed in order to do this?? I've
been assigning the "AssignCustomFields" but to no
avail.  I'm sure this is something silly that I'm
missing.  I'm on rt 3.4.4

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