how to fix errors when transferring a box from a client server to a rental

Instructions for "flying integrations" do not exist. Each integration is individual. Usually they "fly" because you change the ip of the box, so you need to take turns going through the integrations and into:
1. opencart, for example, register a new ip to access the database
2. in some integration with the ERC supplier, write to their tp to open access from a new ip
3. in telephony, prescribe new links to push notifications in telephony personal account or open access to api from a new ip (each is different)
there is no universal pill