Row not found errors   A user deletes a row (with a given primary key value.) A second user updates or deletes the same row at another site. In this case, the second statement fails, as the row is not found. See Row not found errors.

Referential integrity errors   When a column containing a foreign key is included in a publication, but the associated primary key is not included, INSERT statements that reference the foreign key fail.

Also, referential integrity errors can occur when a primary table has a SUBSCRIBE BY expression and the associated foreign table does not: rows from the foreign table may be replicated, but the rows from the primary table may be excluded from the publication.

See Referential integrity errors.

Duplicate primary key errors   Two users insert a row using the same primary key values, or one user updates a primary key and a second user inserts a primary key of the new value. The second operation to reach a given database in the replication system fails because it would produce a duplicate primary key. See Duplicate primary key errors.