Restore data from a non-existent LDAP account

Hello, we use a Seafile server to store data.
An employee has changed her last name and as a result the ldap user on our Seafile server has been deleted.
Is it possible to use a backup of the Seafile server to restore the data of this no longer existing ldap user?
I’m running Server Version: Seafile 10.0.9 on Debian 5.10 - I don’t use docker.