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Cannot perform cascading operation. It would cause field to become Null, which is not allowed. (Error 3401)

office 365 dev account|Last Updated: 6/12/2017
1 Contributor

Applies to: Access 2013 | Access 2016

The cascade operation you are attempting would result in a Null value in the indicated field, which has been set up to not allow Null values. Check the values you are attempting to update and fix them so they do not result in Null values in this field.

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