Step 1: Attach the SSISDB databaseStep 2: Turn on the TRUSTWORTHY property and the CLR propertyIf you are restoring the SSISDB database to an SQL Server instance where the SSISDB catalog was never created, enable common language runtime (clr)Step 3: Open the master key for the SSISDB databaseRestore the master key by this method if you have the original password that was used to create SSISDB.open master key decryption by password = 'LS1Setup!' --'Password used when creating SSISDB'Alter Master Key Add encryption by Service Master KeyStep 4: Encrypt a copy of the mater key by using the service master keyReference:https://docs.microsoft.com/en-us/sql/integration-services/backup-restore-and-move-the-ssis-catalog