Hi everyone,
Since I found some Symbol harvesters are having similar issues to switch a node form one to another, I’d like to share solutions I found on twitter. I tried this steps and could solve the issue.
ISSUE
When you switch a linked node to another node, harvest status doesn’t turn to green Active, but after showing ‘Activation in progress’, turns to Red ‘Failed’ even though there are a lot of vacancies in the node you newly selected.
SOLUTION
- 
Stop harvesting and unlink a node. 
 If this doesn’t work well, logout once and log in your wallet again.
- 
Go to grayed out ‘Key Links’ tab on the harvest section. 
 Delete all the 3 linked address by pressing the trash bin icons on the right.
 Make sure that all address are removed.
 
- 
Logout and login your wallet again. Confirm the 3 key links are empty. 
- 
Go to the harvest section and input a new node address and press ‘select custom node’ on the right. 
- 
Press through ‘Link all keys’ and ’ Activate’ , by inputting your password. See if the status turns from Yellow ‘Activation in progress’ to Green ‘Active’ . 
If you still have same issue after going through the steps above,
- Create a new wallet account
- Send your XYM to the new wallet and wait till Importance score update.
- Try to connect a new node.
If there are any better solutions, please write your comments. Thank you!
 
      
    