New Post: Error Log entry "The interface type 'System.Nullable`1[System.Int32]' does not match the database type 'System.Int32'"

Hi everybody,
Can somebody explain to me what is wrong here with the datatype recently not showing inside the admin dashboard?
The Composite Error Log shows:

__Type mismatch. The interface type 'System.Nullable`1[System.Int32]' does not match the database type 'System.Int32'

The data interface 'AGlobal.xgroup' will not work for the SqlDataProvider 'DynamicSqlDataProvider'__


I've looked at the DynamicSqlDataProvider config file, the datametadata file relating to the datatype being referenced and the SQL design of the table and can't see anything different to other tables with the same table structure settings.

Thanks in advance,