Question: The quote encountered an error when writing back to Salesforce, but there is a need to update this quote with Zuora Account Id and Zuora Subscription Id otherwise the related Customer had to face some business issues.
Answer :
In this case, we can populate the Account Id and Subscription Id by using the following query in the Query Editor in the Developer Console in Salesforce.
select id, zqu__ZuoraAccountID__c, zqu__ZuoraSubscriptionID__c from zqu__Quote__c where Id ='axxxxxxxxxxxx'
Insert the related Quote Id in the Query and query the record. 
Update the Account Id and the Subscription Id and please click on Save Rows and the change will reflect in the Quote.
