Problem with replication of BP Rel from CRM to ECC

Hello.

We have done the necessary customizing to replicate Master Data from CRM to ECC and vice versa. The  replication of the Relationships from CRM to ECC is not working. I receive an error message in the BDOC (SMW01) with no details:

If I go to table SMW3_BDOCQ I only see the relationship between the BDOC and the Queue ID. Any idea of what is happening?

The replication of the Relationships from ECC to CRM are working fine...

Regards!