Unable to Migrate sites due to unknown Database Service Canonicalization schedules from source site

Issue

When the source site is imported the following unknown schedules appear in mappingsScheduleMapper.csv file:

Database Service Canonicalization RemoveTablePoundSignChange Schedule
Database Service Canonicalization SlashDirectionChange Schedule
Database Service Canonicalization BigQueryIgnoreHostChange Schedule
Database Service Canonicalization GoogleSheetsNameChange Schedule

User-added image

Environment

Tableau Server 2020.2.8

Resolution

Option 1
Remove them from csv file and then attempt the import.

Option 2
a. Create new schedules with the same schedule name as those in the mapping file in the Target site. These will just be placeholder schedules. Everything else about the schedule can be kept default (like Type, Priority, Execution, Frequency)
b. In the mapping file, copy and paste the source schedule name to the target schedule name field replacing their respective.
c. Attempt the import again
d. After the import, the schedules can be removed from Tableau Server ("All Sites" > "Schedule")