Error when trying to create SSISDB catalog: An error occurred during Service Master Key decryption

I’ve just installed SSIS on my PC and tried to create the SSISDB instance in SSMS as shown below

01

When I entered a password and clicked OK I got the following error:

An error occurred during Service Master Key decryption. Changed database context to ‘SSISDB’. (.Net SqlClient Data Provider).

To fix this I had to run the following

ALTER SERVICE MASTER KEY FORCE REGENERATE
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