SSIS error while project deployment from the local machine to the server.

While doing a SSIS project deployment on my staging server from my desktop I ran into the following error

"Please create a master key in the database or open the master key in the session before performing this operation, ( Microsoft SQL server, Error:15581)"

The staging SSISDB database was a restore copy of the production .

I tried to alter the master key with the pwd from the prod
USE [SSISDB]
OPEN master Key decryption by password ='password' --my prod password
ALTER Master Key ADD encryption by Service Master Key

But again got the following error -

Msg 15313, Level 16, State 1, Line 2
The key is not encrypted using the specified decryptor.
Msg 15581, Level 16, State 7, Line 3
Please create a master key in the database or open the master key in the session before performing this operation.

Tried to create a master key -
Msg 15578, Level 16, State 1, Line 1
There is already a master key in the database. Please drop it before performing this statement.

tried to drop the master key -
use ssisdb
GO
drop master key

Got the following error
Msg 15580, Level 16, State 1, Line 1
Cannot drop master key because certificate 'MS_Cert_Proj_1' is encrypted by it.


Solution :
I backed up the SSIS Key on prod from the following

use ssisdb
GO

BACKUP MASTER KEY TO FILE = 'v:\backupkeys\SSISDBKey1
    ENCRYPTION BY PASSWORD = 'password' 

Then I copied the key file over to the test server in v:\backupkeys_staging\SSISDBKey1
use ssisdb
GO
RESTORE MASTER KEY FROM FILE = 'v:\backupkeys_staging\SSISDBKey1'
    DECRYPTION BY PASSWORD = 'password'  --prod password used to backup the key
    ENCRYPTION BY PASSWORD = 'newpassword' 
    FORCE