# Introduction
In this pull-request we introduce a service dedicated to the
twenty-standard app installation, we will later be able to re-use
existing logic to be more generic and allow any app installation.
For the moment sticking to this usage
https://github.com/twentyhq/core-team-issues/issues/1995
## Encountered issues
- We decided not to migrate deprecated fields ( also they will become
custom field for any existing workspace having them in the future )
- duplicate criteria
- wrong search index declaration
- forgotten isSearchable
- Attachement seed
- Restored standardId
## Note
For the moment we're still searching through standardId for code that
run on both existing and new workspaces.
For code running on new workspace exclusively we're searching using
universalIdentifier
We will standardize universalIdentifier usage later when we've migratred
all the existing workspaces
## Workspace creation
Will handle workspace creation the same way in another PR
Related https://github.com/twentyhq/twenty/pull/15065
## TODO
- [ ] Double all frontend hardcoded queries to not refer to deprecated
fields especially attachments
Paul Rastoin