Hello Petr,
Yes, it is possible that the customer is not transferred successfully when the condition is replicated. Therefore, you would need to make sure the master data such as customers, materials, Sales Org have been downloaded before trying to bring down the condition records for them.
To resolve the error CND_MAP325 in your case, you should reload the customer. Once the customer being loaded without error, please load the condition again.
Thanks,
Best regards,
Julin Xin