Default value for a parameter is assuning as column in Ignition Report 8 and throwing error

Ignition Early Access
1

I have defined a default value for a parameter in named query.
I am using the named query as report data source.

When going to Design tab, i am getting the below error
ERROR: com.microsoft.sqlserver.jdbc.SQLServerException: Invalid column name ‘Error’.

“Error” is the default value for a parameter