Question:

Why does the following error occur when a Site enters a subject identification on Data Entry in CDMS for a subject. 

Answer:

If this error message occurs, it is because the Subject Identifier is already used on a different site within the same study. Subject Identifiers are unique and the format is defined during study design. 

Site users need to reach out to their CRA o Data Manager to determine the appropriate approach to the case. 

Related Documentation:

Vault Help Documentation: Managing Casebooks

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