Problems after upgrade grafana 7.0

Just after upgrade grafana to version 7, last version, We are getting many issues and We cannot change any alert on alerts Panel that before upgrade that wasnot happen, we get alerts if we want to change any alert panel and cannot make nothing with alerts. Is there some bugs on that?
the alerts are like :
alert validation error: unable to translate notification id to uid, error in condition 0 and so on… (before upgrade everything was ok, every alert was working perfectly, after upgrade is horrible on alerts, many issues and problems)

What we can do for solve that?