How to solve Zoho Project's (PMS) data center issue to add the accounts of EU database into the US database?

How to solve Zoho Project's (PMS) data center issue to add the accounts of EU database into the US database?

We have observed a big problem with Zoho Projects (PMS), where we can’t add a client account if he/she is associated with the Zoho EU database.

Since our Account is in the US database, any account is associated with the EU database can’t be added to our account.

Now, there is a scenario when the client can’t close his/her other Zoho account from his/her side; how can we proceed with such projects?