you can find the default attribute by using this table cmn_attributes table in the database.
In future, if you receive this kind of issue, please
go and check in MSPField table and should not be available any custom fields
which is not available in cmn_attributes table.
This issue I replicated by adding one more row with dummy value which is not
available in cmn_attributes. I received the same issue and shown to Karthik
(Support team).
