In Jasper Server, you may encounter the following error:
org.hibernate.exception.GenericJDBCException: could not insert: [com.jaspersoft lipitor 10mg.jasperserver.api.metadata.common.service.impl.hibernate.persistent.ContentRepoFileResource]
This can be caused by having too many automated reports stored in your Content Files directory. Especially if there are number of large .xls (or any type of file).
Just be sure to keep this directory to less than 50 files, and you should be good!