subscribe integration fails with Enrichment Operations must be syncronous

Summary

trying basic publish-subscribe, with db connection doing insert into table in the subscribe integration

Content

Hi,

I have created a Publish integration (REST), now when creating a subscibe integration (REST) for this publisher i put the DB adapter in doing the table insert, and trying to save i am geeting error message "Enrichment Operations must be synchronous. Use a synchronous operation for the enrichment"

Not sure i understand where it is coming from and why, can someone please clarify, or what did  miss? Thanks