Guidelines for Considering a Foreign Key Relationship
You must not reuse a table only because it contains the necessary foreign key relationship. Instead, to add the required foreign key columns, you can do one of the following:
Configure the database.
Use the Siebel Dock Object Wizard.
Use the EIM Table Mapping Wizard.
Do not use a predefined column that is not a foreign key to store a custom foreign key. Doing so can affect Siebel Remote and Enterprise Integration Manager. This situation can cause problems when Siebel CRM creates EIM mappings or routes data to the user.