SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '0' for key 'PRIMARY', query was: INSERT INTO index_event (type, entity, entity_pk, created_at, new_data) VALUES (?, ?, ?, '2018-05-07 16:07:15', ?)

i am getting this error whenever i am trying to edit any product description?

how do i resolve and what does it mean ?

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