Stop getting "Device Configuration Backup failed"

Stop getting "Device Configuration Backup failed"

Hello guys,
We recently decided to migrate from build 12.3.x to 12.4.101. So we generated a backup; however, we found it's totally useless in another build ! This was the first dark side of issue.
Then we went for a fresh installation and configuration with build 12.4.101 and a time consuming configuration procedure ( Adding devices and configuring interfaces and monitors ). Soon, we realized that all devices are added to NCM by default. As a result, we are getting this error constantly. 
 Could you please help me to stop it?