Crm Exception: Message: Customer lookup [CustomerId] is invalid. Customer lookups can only be associated with 1 Account and 1 Contact error while importing solution in CRM

While trying to import solution to our test environment from our dev environment we got the below error

 “Crm Exception: Message: Customer lookup [CustomerId] is invalid. Customer lookups can only be associated with 1 Account and 1 Contact”

The way we got it fixed

• Unzip the solution and open customizations.xml file
  
• Remove all attributes with name “CustomerId” (Lead, Invoice, Opportunity entity)
  

• Find all entity relationships with ReferencingAttributeName equals CustomerId and add to EntityRelationship new attribute: unmodified=”1″
  

• Zip solution back and import it.
  

https://community.dynamics.com/crm/f/117/t/198818

Hope it helps..

Author: Nishant Rana

I love working in and sharing everything about Microsoft.NET technology ! View all posts by Nishant Rana