PostgreSQL error

postgresql DB shows an error related to pg_toast.

2018-05-21_05:14:42.48860 ERROR: unexpected chunk number 6 (expected 2) for toast value 6418544 in pg_toast_16490
2018-05-21_05:14:42.48862 STATEMENT: SELECT id, authz_id, org_id, name, environment, last_updated_by, created_at, updated_at, serialized_object FROM nodes WHERE (org_id = $1 AND name = $2) LIMIT 1

Do you experienced a resolution procedure for this?