Oracle Error Message
ORA-26536: refresh was aborted because of conflicts caused by deferred transactions
Reason for the Error
There are outstanding conflicts logged in the DEFERROR table at the materialized view’s master site.
Solution
Resolve the conflicts in the master DEFERROR table and refresh again after the table is empty. Alternatively, refresh with REFRESH_AFTER_ERRORS, even if there are conflicts in the master’s DEFERROR table. Proceeding despite conflicts can result in an updatable materialized view’s changes appearing to be temporarily lost, until a refresh succeeds after the conflicts are resolved.