https://www.postgresql.org/docs/12/logical-replication-restrictions.html

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/12/logical-replication-restrictions.html
Description:

Here, we should add one more point:

* Any column part of the replica identity needs to be of a type with a
equality operator.

Use Case:
When, I have added a table for logical replication(without any primary key)
which had a column with json datatype. I got below error at
target(subscription) db:

LOG: background worker "logical replication worker" (PID 17092) exited
with exit code 1

After that, I altered the table at source db and converted the datatype to
jsonb instead of json. Then, I dropped and recreated the table schema with
jsonb column datatype on replica db and the error got resolved.