Committing changes for a Calendar Synchronization job fails with: SaveToAgentDB2 Error: 94 - I (4349072)

When a calendar synchronization job was created based on an existing mail synchronization job, and then a new job was added, the changes cannot be committed, it fails with:

1/5/2011 12:07:09 PM aeEMWCommit::CCollection::SaveToAgentDB2 Error: 94 - Invalid use of Null

1/5/2011 12:07:09 PM aeEMWCommit::CCollectionProp::EMWDBCC event Error: 3201 - You cannot add or change a record because a related record is required in table 'Servers'. (Source: CRecordset::Update| Number: 3201 - You cannot add or change a record because a related record is required in table 'Servers'.)

1/5/2011 12:07:09 PM aeEMWCommit::CCollection::SaveToAgentDB2 Error: ( Cannot change enabled collection)

1/5/2011 12:07:09 PM aeEMWCommit::CCalendarJob::CommitChanges Cannot update the agent's database.