SummaryWhen attempting to access 'Manage Database Mappings' from Central Administration -> Nintex Workflow Management -> Database Setup the following error might occur: "'ddlDb' has a SelectedValue which is invalid because it does not exist in the list of items."
Perform a SELECT * FROM query on the following Nintex Configuration database tables:
- Make sure all database names listed from dbo.databases exist and are online.
- Make sure that DatabaseID values from dbo.storage and SPContentDbId values from dbo.contentdbmapping match up to a DatabaseID value from dbo.databases
If you find a reference to a database that doesn't exist, delete it from the table.