One reason why you may not be able to create a relationship is because there may be an issue with the way you have normalized the database.

Name: One reason why you may not be able to create a relationship is because there may be an issue with the way you have normalized the database.
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If the normalization of the database is not properly done, it can lead to inconsistencies and redundancy, which can cause difficulties in creating relationships between tables.

One Reason Why You May Not Be Able to Create