No new information will be written to database if the database size limit is reach and your Symantec Management Platform will become very slow.
ITMS 8.x
Database file was close to 12 GB, which is over the size limit offered by Microsoft
SQL Express databases have strict size limits which can cause problems when CMDB grows.
Microsoft SQL Server 2005 Express edition has a database size limit to 4GB
Microsoft SQL Server 2008 Express edition has a database size limit to 4GB
Microsoft SQL Server 2008 R2 Express edition has a database size limit to 10GB
Microsoft SQL Server 2012 Express edition has a database size limit to 10GB
Microsoft SQL Server 2014 Express edition has a database size limit to 10GB
Microsoft SQL Server 2016 Express edition has a database size limit to 10GB
Microsoft SQL Server 2017 Express edition has a database size limit to 10GB
Microsoft SQL Server 2019 Express edition has a database size limit to 10GB
Microsoft SQL Server 2022 Express edition has a database size limit to 10GB
It is recommended to change to Full version of SQL Server without such limitations.