Explanation:
An <UPDATE statement> was performed for an updatable join view table. This <UPDATE statement> leads to an internal insert into one of the underlying base tables. The specifications made in the <UPDATE statement> are not sufficient to form all mandatory columns which are needed for the implicit <INSERT statement>.
User Action:
Issue an <INSERT statement> on the underlying base table. This can prevent the necessity of inserting when performing the <UPDATE statement> on the join view table.