SSISDB Error: The current master key cannot be decrypted

I had to move the SSISDB database f rom server1 to Server2

On Server 1 I did the following
Backed up the master key
USE SSISDB


BACKUP MASTER KEY TO FILE = 'C:\MSSQL\Keys\SQLSVER1_key'
ENCRYPTION BY PASSWORD = 'oldpassword'


Backed up the SSISDB database .

Copied the key and the back up file to  server2

On server2 I did the following
Restored the SSISDB
Restored the master key as follows
USE SSISDB


RESTORE MASTER KEY FROM FILE = 'V:\MSSQL\Keys\SQLSVER1_key'


DECRYPTION BY PASSWORD = 'oldpassword'


ENCRYPTION BY PASSWORD = 'newpassword'


But ran into an issue where it threw the error  -
The current master key cannot be decrypted. If this is a database master key, you should attempt to open it in the session before performing this operation. The FORCE option can be used to ignore this error and continue the operation but the data encrypted by the old master key will be lost.

I ran  the script again with the FORCE option

USE SSISDB


RESTORE MASTER KEY FROM FILE = 'V:\MSSQL\Keys\SQLSVER1_key'


DECRYPTION BY PASSWORD = 'oldpassword'


ENCRYPTION BY PASSWORD = 'newpassword'
FORCE

That did not work, still got error

Solution: I had copied the keys to a folder where SQL SERVICE account did not have r/w permissions. Copied the key to the folder where the permission was already setup and rant the script with the FORCE option  and it worked!