managed+dirty insertion error when adding express form to global area

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when trying to add 4 fields (basic text) to a normal vanilla express form via the GUI.

receive the error

managed+dirty entity Concrete\Core\Entity\Attribute\Key\Settings\TextSettings@000000005754e3b5000000005dcfd252 can not be scheduled for insertion

oddly, when adding the same form with any 3 of those 4 fields, no error.

Status: New

concrete5 Environment Information

# concrete5 Version
Core Version - 8.3.0RC2
Version Installed - 8.3.0RC2

Browser User-Agent String

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36