Cannot insert the value NULL into column [ColumnName]

Scenario: Happens when mandatory fields in NAV tables are left blank during an INSERT or UPDATE.

Error Message: Cannot insert the value NULL into column [ColumnName]

Cause: The field has a NOT NULL constraint, and the source data has missing values.

Resolution:

1. Identify the fields causing the issue (SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Table' AND IS_NULLABLE = 'NO').
2. Validate and clean the source data before importing.