Symptoms
•Migrated from WSS 3.0 to SharePoint 2010 Foundation and upgraded K2 at the same time from 4.4 to 4.6.6.
• Any tasks that were generated BEFORE the migration cannot be reassigned and produce the error 'Worklist Item from [user] could not be redirected to [user].
Diagnoses
1.Open the [Server].[Server] table and verified how many servers are shown there?
Noticed the old server is also showing there.
2.Opened [K2].[Server].[ProcInst] and look for the value of the ServerID
Noticed that there where ServerID’s of “1” and “0”
3.ServerID is the indication of which server in the NLB cluster is currently working on an instance.
4. A serverID of 0 means that the instance is available for any server to process.
Resolution
1. Made backups of the DB’s
2. Deleted the old server from [Server].[Server] table
3. Because client environment is not setup for NLB:
a. We stopped the K2Service
b. Edit the [K2].[Server].[ProcInst] and then update the ServerID’s from "1" to "0".
4. Restart the service