The purchase code is already activated on another site
Written by Linh_Blueskytechco
How can i activate my purchase code for another domain?
If you have activated your theme before and need to activate it again for other domain for some reason, you must first delete the existing record. This is true even if you re-register your theme with the same domain. Requirement of re-registering the theme after every new installation provides an extra layer of security that ensures your purchase code is only available to your usage.
Please follow this direction for details
Login to your Shopify store, go to Online Store > Themes
Click to Customize
Click to Theme Setting icon in left menu and select Purchase Code
Insert your Purchase Code
Select Remove purchase code in Purchase action
Click Save to finish remove purchase code
Use your purchase code and activate Umino theme for other domain
Note: Purchase code can not be remove if you insert the wrong purchase code