Time Machine must create a new backup
I've been setting Synology systems up for a while, but have never encountered quite so stubborn an issue. I'm working with someone with a new 2019 iMac and new DS218+. For whatever reason the Time Machine backups have been failing recently, spitting out the following message: "Time Machine completed a verification of your backups. To improve reliability, Time Machine must create a new backup for you.” The options then are Back Up Later or Start New Backup. Neither option seems to work. Once you try starting over it wipes the backup, makes it mostly to the end, then spits out the error message again. The Mac is running Catalina, and DS on the latest DSM software. I am connecting to Time Machine through SMB directly to the IP address of the NAS, and have AFP disabled. The iMac is ethernet wired in to the network. After scouring the forums it seems to be people just giving up on backing up Time Machine to a network destination. Synology support blames it on Apple. Apple blames Synology. Anyone encountered this, or have some things I could try?
Norton has been one of the #1 causes of macOS panics reported in the discussions.apple.com forums.