2.3/dev Fix for wrong database fields - errors on installation

The following commit changes 'is_required' to 'required' in the code but the installations creates a database with 'is_required'. This is a fix for the database.

```
Commit: b057cfb6f85208df14e1cc1d86cb9b0f4dcba832 - Removing is_ prefix (streams_core - locked)
```