ISSUE
When 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
ERROR CODE
RESOLUTION
Perform a SELECT * FROM query on the following Nintex Configuration database tables:
- dbo.databases
- dbo.contentdbmapping
- dbo.storage
- 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
Delete any references found to a database that does not exist.