change customer in expense

change customer in expense

Hi,

I am trying to change a customer in an expence and I obtain the following message:

  • Expenses associated with customer "Old customer" can only be added to this report.

Would you know why I have this error message? It does not seem that there is any rules that force to this precise customer.
If I reject the report, the report owner has the same error message when he tries to change the customer.

Thanks for your help!
Stanislas