Change a shared data source to expression-based connection string

[delreluca]

I deployed a report via Write-RsCatalogItem. In the past it referred to a shared data source, however the new RDL uses an embedded data source with an expression-based connection string.

After deployment it still referred to the shared data source. I was able to change it via the portal:

1. Manage → Data sources → Change to A custom data source
2. Set the connection type, enter a bogus connection string and choose credentials
3. After saving and reloading there will be a Revert to default under the connection string, click that to use the expression
4. Save

However, I am not sure how to do this with this module.

I noticed it works correctly for new reports that have no existing data sources to change, however.

So, is the only workaround to rename the data source?