All Lime CRM databases that are to be used after a Lime CRM Server upgrade must be migrated to the latest revision of the database schema. This is done using limefu with the following command (from version 12.4):
limefu database upgrade --application "DATABASE DISPLAY NAME"
When upgrading databases, the user running the limefu command and who is thereby the user accessing the database, must have dbo as the default schema in the database.